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Publikationer: 1970-99

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1999

Andersen-Ranberg K, Christensen K, Jeune B, Skytthe A, Vasegaard L, Vaupel JW (1999).
Activity of daily living among elderly and oldest-old in Denmark.
Age and Aging. 1999; 28: 373-377.

Brix TH, Kyvik KO, Hegedüs L.
Major role of genes in the etiology of sporadic simple goiter - Results from a population based twin study.
Journal of Clin Endocrinol and Metab. 1999; 84: 3071-3075.

Christensen K, Gaist D, Jeune B, Vaupel JW.
En tand pr. barn - myte eller virkelighed?
[A tooth per child - myth or reality? (in Danish)]
Ugeskrift for Læger 1999; 161: 446-447.

Christensen K, Holm NV, McGue M, Corder L, Vaupel JW.
A Danish population-based twin study on general health in the elderly.
Journal of Aging and Health. 1999; 11:49-64.

Christensen K.
Hvorfor ældes vi så forskelligt?
[Why do we age so differently? (in Danish)]
Ugeskrift for Læger.1999; 161: 1905-1909.

Gervil M, Ulrich V, Kyvik KO, Olesen J, Russell MB.
Migraine without aura: A population-based twin study.
Ann Neur 1999; 46(4): 606-611.

Hartvigsen J, Lings S, Corder EH.
Coding of occupation for the "young cohort" of the Danish twin register. A resource for future epidemiologic research.
Scand J Public Health 1999; 27: 148-15

Kohler HP, Rodgers JL, Christensen K.
Is fertility behaviour in our genes? Findings from a Danish twin study.
Population and Development Review. 1999; 25:253-288.

Lebeuf-Yde C, Kyvik KO, Bruun NH.
Low back pain and life-style. Part II: Obesity. Information from a population-based sample of 29,424 individuals.
Spine 1999; 24(8): 779-784.

Poulsen P, Kyvik KO, Vaag AA, Beck-Nielsen H.
Heritability of non-insulin-dependent Diabetes mellitus (NIDDM) and abnormal glucose tolerance - a population based twin study.
Diabetologia 1999; 42: 139-145.

Rufer N, Brûmmendorf TH, Kolvraa S, Bischoff C, Christensen K, Wadsworth L, Schulzer M, Landsdorf PM.
Telomere fluorescence measurements in granolocytes and T lymphocyte subsets indicate a high turnover of hemaopoietic stem cells and memory T cells in early childhood.
Journal of Experimental Medicine. 1999; 190: 157-167.

Skadhauge LR, Christensen K, Kyvik KO, Sigsgaard T.
Genetic and environmental influence on asthma. A population-based study of 11,688 twin pairs.
European Journal of Lung Medicine. 1999; 13: 8-14.

Ulrich V, Gervil M, Kyvik KO, Olesen J, Russell MB.
Evidence of a genetic factor in migraine with aura: A population-based Danish twin study.
Ann Neur 1999; 45(2): 242-246.

The inheritance of migraine with aura estimated by means of structural equation modelling.
Ulrich V, Gervil M, Kyvik KO, Olesen, Russell MB.
J.Medical Genetics 1999; 36(2): 225-227.

1998 -- til toppen --^

Brix TH, Christensen K, Holm NV, Harvald B, Hegedûs L.
A population based study of Grave's disease in Danish twins.
J Clin Endocrinol 1998; 48: 397-400.

Christensen K, Basso O, Kyvik KO, Juul S, Boldsen J, Vaupel JW, Olsen J.
Fecundability of female twins.
Epidemiology. 1998; 9(2):189-92.

Christensen K, Gaist D, Jeune B, Vaupel JW.
A tooth per child?
Lancet 1998; 352:204.

Iachine IA, Holm NV, Harris JR, Begun AZ, Iachina MK, Laitinen M, Kaprio J, Yashin AI.
How heritable is individual susceptibility to death? The result of an analysis of survival data on Danish, Swedish and Finnish twins.
Twin Research 1998; 1:196-205.

Lebeuf-Yde C, Kyvik KO, Bruun NH.
Low back pain and life-style. Part 1: Smoking. Information from a population-based sample of 29,424 twin individuals
Spine 1998; 23(20): 2207-14.

Lebeuf-Yde C, Kyvik KO.
At what age does low back pain become a common problem? A study of 29,424 twin individuals aged 12-41.
Spine 1998; 23(2): 228-34.

Poulsen P, Vaag AA, Kyvik KO, Jensen DM, Beck Nielsen H.
Low birth weight is associated with non-insulin-dependent diabetes mellitus in discordant monozygotic and dizygotic twins.
Ugeskrift for læger 1998; 160: 2382-7. (Danish)

Vaag AA, Poulsen, Feinberg MR.
Is low birth weight a risk factor for development of non-insulin-dependent diabetes mellitus?
Ugeskrift for læger 1998; 160: 2377-81. (Danish)

Vaupel JW, Carey JR, Christensen K, Johnson TE, Yashin AI, Holm NV, Iachine IA, Khazaeli AA, Liedo P, Longo VD, Yi Z, Manton KG, Curtsinger JW.
Biodemographic trajectories of longevity.
Science 1998; 280: 855-60.

Yashin AI, Iachine IA, Christensen K, Holm NV, Vaupel JW.
The genetic component of discrete disability traits: Liability models with age dependent thresholds.
Behav Genet 1998; 28:207-14.

Yashin AI, Vaupel JW, Andreev KF, Iachine IA, Carotenuto L, de-Benedictis G.
Combining genetic an demographic information in population studies of aging and longevity.
J Epidemiol Biostat 1998; 3: 289-94.

1997 ^-- til toppen --^

Christensen K, Damsbo N.
Tvillingforskning - potentialer nu og i fremtiden.
[Twin research - potentials now and in the future (in Danish)]
Ugeskrift for læger. 1997; 159: 6083-4.

Løgstrup N, Sjølie AK, Kyvik KO, Green A.
Long term influence of insulin dependent diabetes mellitus on refraction and its components: population based twin study.
Br J Ophtalmology. 1997; 81: 343-9.

McGue M, Christensen K.
Genetic and environmental contributions to depression symptomatology: Evidence from Danish twins 75 years of age and older.
Journal of Abnormal Psychology. 1997; 106: 439-48.

Petersen JS, Kyvik KO, Bingley PJ, Gale EAM, Green A, Dyrberg T, Beck-Nielsen H.
Population based study of prevalence of islet cell autoantibodies in monozygotic and dizygotic Danish twin pairs with insulin dependent diabetes mellitus.
Br Med J. 1997; 314: 1575-9.

Petrovsky N, Harrison LC, Kyvik KO, Beck-Nielsen H, Green A, Bonnevie-Nielsen.
Evidence for the viral aetiology of IDDM (letter).
Autoimmunity. 1997; 25(4): 251-2.

Poulsen P, Vaag AA, Kyvik KO, Beck-Nielsen H.
Low birthweight associated with non-insulin dependent diabetes mellitus in discordant monozygotic and dizygotic twin pairs.
Diabetologia. 1997; 40:439-46.

Rosholm JU, Christensen K.
Relationship between drug use and self-reported health in elderly Danes.
Eur J Clin Pharmacol. 1997; 53:179-83.

1996 ^-- til toppen --^

Christensen K, Fogh-Andersen P.
Cleft-twin sets.
The Cleft Palate-Craniofacial Journal. 1996; 33: 530.

Christensen K, Holm NV, Vaupel JW.
Alzheimer`s disease and twins.
Lancet. 1996; 347: 976.

Christensen K, Mitchell LE.
Familial recurrence-pattern analysis of nonsyndromic isolated cleft palate - a Danish registry study.
American Journal Of Human Genetic. 1996; 58: 182-190.

Christensen K, Vaupel JW, Holm NV, Yashin AI.
Mortalitet blandt tvillinger efter 6-års alderen: Programmeringshypotese versus tvillingmetoden.
[Mortality amongst twins after the age of six. (in Danish)]
Ugeskrift for Læger. 1996; 58: 7415-7419.

Herskind AM, McGue M, Holm NV, Sørensen TIA, Harvald B, Vaupel W.
The heritability of human longevity: A population-based study of 2872 Danish twin pairs born 1870-1900.
Hum Genet. 1996; 97(3): 319-323.

Herskind AM, McGue M, Iachine IA, Holm N, Sørensen TIA, Harvald B, Vaupel W.
Untangling genetic influences on smoking, body mass index and longevity: A multivariate study of 2464 Danish twins followed for 28 years.
Hum Genet. 1996; 98: 467-475.

Herskind AM, McGue M, Sørensen TIA.
Sex and age specific assessment of genetic and environmental influences on body mass index in twins.
Int J Obes Relat Metab Disord. 1996; 20(2):106-113.

Husby S, Holm N, Christensen K, Skov R, Morling N, Petersen PH.
Cord blood immunoglobulin E in like-sexed monozygotic and dizygotic twins.
Clinical Genetic. 1996; 50. 332-338.

Kläning U, Mortensen PB, Kyvik KO.
Increased occurrence of schizophrenia and other psychiatric illnesses among twins.
Br J Psychiatry. 1996; 168: 688-692.

Kyvik KO, Christensen K, Skytthe A, Harvald B, Holm NV.
The Danish Twin Registry.
Danish Medical Bulletin. 1996; 43(5): 467-470.

Kyvik KO, Green A, Beck Nielsen H.
Den yngste del af Det Danske Tvillingregister. Etablering og analyse af zygotispecifikke tvillingfødselsrater.
[The new Danish Twin Registry: Establishment and analysis of twinning rates (in Danish)]
Ugeskrift for læger.1996; 158: 3456-3460.

Løgstrup N, Sjølie AK, Kyvik KO, Green A.
Lens thickness and insulin-dependent diabetes mellitus: A population based twin study.
B J Ophtalmology. 1996; 80: 405-408.

Mitchell LE, Christensen K.
Analysis of the recurrence patterns for nonsyndromic cleft lip with or without cleft palate in the families of 3,073 Danish probands.
American Journal of Medical Genetics. 1996; 61: 371-376.

1995 ^-- til toppen --^

Bertelsen A, Gottesman II.
Schizoaffective psychoses: Genetical clues to classification.
Am J Med Genet. 1995; 60(1): 7-11.

Christensen K, Vaupel JW, Holm NV, Yashin AI.
Mortality among twins after age 6: Fetal origins hypothesis versus twin method.
Br Med J. 1995; 310: 432-436.

Kyvik KO, Green A, Beck-Nielsen H.
Concordance rates of insulin dependent diabetes mellitus: A population based study of young Danish twins.
Br Med J. 1995; 311: 913-917.

Kyvik KO, Green A, Beck Nielsen H.
The new Danish Twin Register: Establishment and analysis of twinning rates.
Int J Epidemiol. 1995; 24: 589-596.

Vaag A, Henriksen JE, Madsbad S, Holm NV, Beck-Nielsen H.
Insulin secretion, insulin action, and hepatic glucose production in identical twins discordant for NIDDM.
J Clin Invest, 1995; 95: 690-698.

Yashin AI, Iachine I.
How long can humans live? Lower bound for biological limit of human longevity calculated from Danish twin data using correlated frailty model.
Mech Ageing Dev. 1995; 80:147-169. 1994

Christensen K, Fogh-Andersen P.
Læbe-ganespalte. Arv og miljø.
[Cleft lip and palate. Inheritance and environment (in Danish)].
In: Vilting K, (ed.). "Læbe-ganespalte" [Cleft lip and palate].
Koebenhavn, Munksgaard 1994:18-29.

1994 ^-- til toppen --^

Konradsen HB, Hahn-Zoric M, Nagao AT, Hanson LA.
Differences within mono- and dizygotic twin-pairs in spectrotypes and clones of IgG2 antibodies to pneumococcal polysaccharide. Type 1 and c-polysaccharide after vaccination.
Scand.J.Immunol. 1994; 40(4): 423-8.

Konradsen HB, Oxelius VA, Hahn-Zoric M, Hanson LA.
The importance of G1m and 2 allotypes for the IgG2 antibody levels and avidity against pneumococcal polysaccharide type 1 within mono- and dizygotic twin-pairs.
Scand.J.Immunol. 1994; 40(2): 251-6.

1993 ^-- til toppen --^

Christensen K, Fogh- Andersen P.
Cleft lip (+/- Cleft Palate) In Danish twins, 1970-1990.
American Journal of Medical Genetics. 1993; 47: 910-6.

Christensen K., Fogh-Andersen P.
Isolated Cleft palate in Danish multiple births, 1970-1990.
The Cleft Palate-Craniofacial Journal. 1993; 30: 469-74.

Konradsen HB, Henrichsen J, Wachmann, Holm NV.
The influence of genetic factors on the immune response as judged by pneumococcal vaccination of mono- and dizygotic twins.
Clin Exp Immunol. 1993; 92(3): 532-6.

McGue M, Vaupel JW, Holm, NV, Harvald B.
Longevity is moderately heritable in a sample of Danish twins born 1870-1880.
J Gerontol. 1993; 48(6): B237-44.

Schultz Larsen FV.
Atopic dermatitis: a genetic-epidemiologic study in a population-based twin sample.
J Am Acad Dermatol. 1993; 28: 719-23.

Vaupel JW, Yashin AI, Xue L, Holm NV, Harvald B.
Strategies for modelling genetics in survival analysis: Alternative frailty models applied to data on the lifespans of danish twins.
Population Studies of Aging #1: 1-27, Odense University Press. 1993.

Yashin AI, Vaupel JW, Chervonenkis AY, Iachine IA, Harvald B, Holm NV.
When two are better than one: An inclusive survival model for combining bivariate data sets.
Population Studies of Aging #2: 1-23, Odense University Press. 1993.

1992 ^-- til toppen --^

Anderson JE, Louis TA, Holm NV, Harvald B.
Time dependent association measures for bivariate survival distributions.
J Am Statist Ass. 1992; 87: 641-650.

Hougaard P, Harvald B, Holm NV, Harvald B.
Assessment of dependence in genetics: Danish twin data applied to a gerontological question.
In J.P.Klein and P.K. Goel (eds.) Survival Analysis: State of the Art. 1992; pp 77-97, Kluver Academic Press, the Nederlands.

Hougaard P, Harvald B, Holm NV.
Genetic determination of life times elucidated by adult Danish twins born 1881-1930.
J Am Statist Ass. 1992; 87: 17-24.

Hougaard P, Harvald B, Holm NV.
Models for multivariate failure time data with application to the survival of twins.
In P.G.M. van der Heijden, W. Jansen, B Francis and G.V.H. Seeber (eds.) Statistical Modelling. 1992; pp 159-173, Elsevier Science Publishers B.V.

Vaupel JW, Yashin AI, Xiu L, Holm NV.
Survival analysis in genetics: Danish twin data applied to a gerontological question.
In J.P. Klein and P.K.Goel (eds.) Survival Analysis: State of the Art. Kluver Academic Press, the Nederlands. 1992.

1989 ^-- til toppen --^

Bønnelykke B, Hauge M, Holm NV, Kristoffersen K, Gürtler H.
Evaluation of zygosity diagnosis in twin pairs below age seven by means of a mailed questionnaire.
Acta Genet Med Gemellol Roma. 1989; 38: 305-313.

Gottesman II, Bertelsen A.
Confirming unexpressed genotypes for skizophrenia. Risks in the offspring of Fischer`s Danish identical and fraternal discordant twins (see comments).
Arch Gen Psychiatry. 1989; 46(10):867-72.


1988 ^-- til toppen --^
Menné T, Holm NV.
Genetic aspects to nickle sensitization.
I: H. Maibach and T. Menné (eds.): Nickle and the skin: 'Immunology and toxicology'. 1988; pp 101-107. CRC Press, Florida.

1987 ^-- til toppen --^

Bønnelykke B, Søgaard J, Nielsen J.
Seasonality in twin birth rates, Denmark, 1936-84.
J Epidemiol Community Health. 1987; 41: 305-313.

Husby S, Schults-Larsen F, Petersen PH.
Genetic influence on the serum levels of naturally occurring human IgG antibodies to dietary antigens. Quantitative assessment from a twin study.
J Immunogenet. 1987; 14(2-3): 131-142.

Schultz-Larsen F, Grunnet N.
Genetic investigations in atopic dermatitis.
Tissue-Antigens. 1987: 29(1): 1-6.

1986 ^-- til toppen --^

Menné T, Holm NV.
Genetic susceptibility in human allergic contact sensitization.
Seminars in Dermatology, 1986; 5: 301-306.

Olsen J, Knudsen LB.
Twinning rates by recidence in Denmark 1978-1982.
Scand.J.Soc.Med. 1986; 14:147-150.

Schultz Larsen F, Holm NV, Henningsen K.
Atopic dermatitis. A genetic epidemiologic study in a population-based twin sample.
J Amer Acad Dermatol. 1986; 15: 487-494.

1985 ^-- til toppen --^

Bertelsen A.
Controversies and consistencies in psychiatric genetics.
Acta Psychiatr Scand Suppl 1985; 319: 61-75.

Holm NV, Hauge M, Jensen OM.
Cancer in the Danish twin population: A population-based twin study.
In Müller, Weber (eds). Familial Cancer. 1st Int Res Conf 1985, 190-191 (Karger, Basel).

Holm NV, Hauge M, Jensen OM.
Completeness and validity of the Danish Cancer Register evaluated by a population based twin study.
I: S.A. Birkeland (ed.). Vævsdyrkningslaboratoriet. Forskning 1971-86. Odense Universitet 1985.

Holm NV.
Population Based twin studies: An irreplaceable tool in etiological cancer research.
I: Müller, Weber (eds.). Familial Cancer. 1st Int Res Conf 1985, 208-9 (Karger, Basel).

Kendler KS, Holm NV.
Differential enrollment in twin registries: Its effect on prevalence and concordance rates and estimates of genetic parameters.
Acta Genet Med Gemellol 1985; 34:125-140.

Schultz-Larsen F, Grunnet N.
Lymphocyte transformation tests and subpopulations of lymphocytes in population-based material of atopic dermatitis in twins.
Scand J Immunol 1985; 21(4): 375-381.

Schultz-Larsen, Holm NV.
Atopic dermatitis in a population based twin series. Concordance rates and heritability estimation.
Acta Derm Venereol Suppl Stockh 1985; 114: 159-13, 1943-6.

1984 ^-- til toppen --^

Brandrup F.
Psoriasis in first-degree relatives of psoriatic twins.
Acta Derm Venereol. 1984; 64(3): 220-226.

1983 ^-- til toppen --^

Holm NV.
A note on ascertainment probability in the Allen/Hrubec twin model.
Acta Genet Med Gemellol. 1983; 32: 37-47.

Menné T, Holm NV.
Hand eczema in nickle sensitive female twins. Genetic pre-disposition and environmental factors.
Contact Dermatitis. 1983; 9: 289-96.

Menné T, Holm NV.
Nickle allergy in a female twin population.
Internat J Dermatol. 1983; 22: 22-8.

Schultz Larsen F, Holm NV.
Evaluation of an identification method of twin pairs based on the personal numbering system in Denmark.
Danish Med Bull. 1983; 30: 424-7.

1982 ^-- til toppen --^
Brandrup F, Green A, Holm NV.
Prævalensen af psoriasis i Danmark. [The prevalence of psoriasis in Denmark (in Danish)]
Ugeskr. Laeger. 1982; 144: 3538-3541.

Hansen HE, Mennè T, Olesen-Larsen S.
HLA antigens in nickel sensitive females: Based on a twin and patient population.
Tissue Antigens. 1982; 19(4): 306-10.

Heltberg A, Holm NV.
Concordance in twin and recurrence in sibships in multiple sclerosis.
Lancet 1982; 1068. (Letter).

Holm NV, Hauge M, Jensen OM.
Studies of cancer etiology in a complete twin population. Breast cancer, colorectal cancer and leukemia.
Cancer Survey 1: 17-32. 1982.

1981 ^-- til toppen --^
Brandrup F, Holm NV, Grunnet N, Henningsen K, Hansen HE.
Psoriasis in monozygotic twins - variations in expression in individuals with identical genetic constitution.
Acta Dermatovener 62: 1982; 229-36.

Hauge M.
The Danish twin register.
I: Mednick SA, Baert AE, Bachmann BP (eds.): Prospective Longitudinal Research. An empirical basis for the primary prevention of psychosocial disorders. Oxford: Oxford University Press. 1981; pp 217-21.

Holm NV.
Studies of cancer etiology in the Danish twin population.
I: Breast cancer. Gedda L, Parisi P, Nance WE(eds.): Twin Research Part C. Epidemiological and Clinical Studies. New York. Alan R. Liss, Inc. 1981; pp 211-6.

Mennè T.
Nickel allergy-reliability of patch test. Evaluated in female twins.
Derm Beruf Umwelt.1981; 29(6): 156-60.

1980 ^-- til toppen --^

Holm NV, Hauge M, Harvald B.
Etiologic factors of breast cancer elucidated by a study of unselected twins.
J Natl Cancer Inst. 1980; 65(2): 285-98.

Mennè T.
Relationship between cobalt and nickel sensitization in females.
Contact Dermatitis 1980; 6(5): 337-40.

Rachootin P, Olsen J.
Secular changes in twinning rate in Denmark 1931 to 1977.
Scand J Soc Med 1980; 8: 89-94.

1979

Essen-Moller E, Fischer M.
Do the partners of dizygotic schizophrenic twins run greater risk of schizophrenia than ordinary siblings?
Hum Hered 1979; 29(3): 161-5.

1978 ^-- til toppen --^

Bertelsen A.
A Danish twin study of maniac-depressive disorders.
Prog Clin Biol Res 1978; 24A: 119-124.

Brandrup F, Hauge M, Henningsen K, Eriksen B.
Psoriasis in an unselected series of twins.
Arch Dermatol 1978; 114: 874-878.

Møller M, Horsman A, Harvald B, Hauge M, Henningsen K, Nordin BE.
Meta-carpal morphometry in monozygotic dizygotic elderly twins.
Calcif Tissue Res. 1978; 25(2): 197-201.

Nielsen, Homma A, Isaksen B, Bertelsen A.
Incidence of twin birth in Denmark from 1911 to 1974.
Acta Genet Med Gemellol Roma. 1978; 27: 45-9.

1977

Bertelsen A, Harvald B, Hauge M.
A Danish twin study of maniac-depressive disorders.
Br J Psychiatry 1977; 130: 330-51.

Fischer M.
Twin studies and diagnostic issues in schizophrenia.
I: Gershon ES, et al. (ed.) The impact of biology on modern psychiatry. New York, Plenum Press, QV 77 I34 1975, pp. 261-70.

Hauge M.
The aetiology of MS-genetic aspects.
Acta Neurol Scand Suppl. 1977; 63: 49-53.

Kemp A.
Monozygotic twins with temporal arteritis and ophthalmic arteritis.
Acta Ophthalmol (Copenh). 1977;55:183-90.

Nielsen J, Homma A, Bertelsen A.
Cytogenetic investigation in twins with maniac-depressive disorders (22 monozygotic and 27 dizygotic twin pairs).
Br J Psychiatry 1977; 130: 352-4 1973.

1973

Andreasen PB, Froland A, Skovsted L, Andersen SA, Hauge M.
Diphenylhydantoin half-life in man and inhibition by phenylbutazone: The role of genetic factors.
Acta Med Scand 1973; 193(6):561-4.

Schiøttz Christensen E.
Role of birth history in the aetiology and course of febrile convulsions. A twin study.
Neuropadiatrie 1973; 4: 238-44.

Schouboe K, Hauge M.
The application of twin methods in orthodontic research.
Scand JDent Res. 1973; 81(7): 563-6.

1972 ^-- til toppen --^
Fischer M.
Enviromental factors in schizophrenia. Comparative studies in identical twins.
Nerveartz. 1972; 43(5): 230-8.

Schiottz Christensen E.
Genetic factors in febrile convulsions. An investigation of 64 same-sexed twin pairs.
Acta Neurol Scand. 1972; 48: 538-46.

1971 ^-- til toppen --^

Fischer M.
Psychoses in the offspring of schizophrenic monozygotic twins and their normal co-twins.
Br J Psychiatry 1971; 118(542): 43-52 1970

1970 ^-- til toppen --^

Fischer M.
Genetic of schizophrenia.
Lancet 1970; 1(7643): 424.

Harvald B, Hauge M.
Coronary occlusion in twins.
Acta Genet Med Gemellol (Roma). 1970; 19(1): 248-50.

Harvald B, Hels J.
Medfødte misdannelser i Grønland. Et follow-up studie af 757 børn født i Godthåb 1957-1964.
[Congenital malformations in Greenland. A follow-up study of 757 children born in Godthåb 1957-1964. (in Danish)]
Ugesk laeger. 1970; 132(20): 919-24.

Hauge M, Harvald B, Reid DD.
A twin study of the influence of smoking on morbidity and mortality.
Acta Genet Med Gemellol. 1970; 19(1):335-6.

Herrlin KM, Hauge M, Erikson SA.
Finger print patterns in an unselected series of triplets.
Hum Hered 1970; 20(3): 336-55.

Schiottz Christensen E.
Computer selection of twin pairs.
Acta Genet Med Gemellol Roma. 1970; 19: 341-3.

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