1Heitmann, BL, Stroger, U, Mikkelsen, KL, Holst, C, Sørensen, TIA. Large heterogeneity of the obesity epidemic in Danish adults. Public Health Nutrition 2004; 7: 453–60.
2Fogelholm, M, Kukkonen-Harjula, K. Does physical activity prevent weight gain – a systematic review. Obesity Reviews 2000; 1: 95–111.
3Togo, P, Osler, M, Sørensen, TIA, Heitmann, BL. A longitudinal study of food intake patterns and obesity in adult Danish men and women. International Journal of Obesity and Related Metabolic Disorders 2004; 28: 583–93.
4Heitmann, BL, Kaprio, J, Harris, JR, Rissanen, A, Korkeila, M, Koskenvuo, M. Are genetic determinants of weight gain modified by leisure-time physical activity? A prospective study of Finnish twins. American Journal of Clinical Nutrition 1997; 66: 672–8.
5Heitmann, BL, Harris, JR, Lissner, L, Pedersen, NL. Genetic effects on weight change and food intake in Swedish adult twins. American Journal of Clinical Nutrition 1999; 69: 597–602.
6Heitmann, BL, Lissner, L, Sørensen, TIA, Bengtsson, C. Dietary fat intake and weight gain in women genetically predisposed for obesity. American Journal of Clinical Nutrition 1995; 61: 1213–7.
7Rasmussen, F, Johansson-Kark, M. The Swedish Young Male Twins Register: a resource for studying risk factors for cardiovascular disease and insulin resistance. Twin Research 2002; 5: 433–5.
8Cederlöf, R, Friberg, L, Jonsson, EKL. Studies on similarity diagnosis on twins with the aid of mailed questionnaires. Acta Geneticae Medicae et Germellologiae 1961; 11: 338–62.
9Pedersen, N, Lichtenstein, P. The Swedish Twin Registry–a presentation. In: Smedby, B, Lundberg, I, Sørensen, TIA, eds. Scientific Evaluation of the Swedish Twin Registry. Stockholm: Swedish Council for Planning and Coordination of Research, 2000; 15–44.
10Heath, EM, Morken, NW, Campbell, KA, Tkach, D, Boyd, EA, Strom, DA. Use of buccal cells collected in mouthwash as a source of DNA for clinical testing. Archives of Pathology and Laboratory Medicine 2001; 125: 127–33.
11Tholin, S, Rasmussen, F, Tynelius, P, Karlsson, J. Genetic and environmental influences on eating behavior: the Swedish Young Male Twins Study. American Journal of Clinical Nutrition 2005; 81: 564–9.
12Baecke, JA, Burema, J, Frijters, JE. A short questionnaire for the measurement of habitual physical activity in epidemiological studies. American Journal of Clinical Nutrition 1982; 36: 936–42.
13Philippaerts, RM, Lefevre, J. Reliability and validity of three physical activity questionnaires in Flemish males. American Journal of Epidemiology 1998; 147: 982–90.
14Wing, JK, Babor, T, Brugha, TE, Burke, J, Cooper, JE, Giel, R, et al. SCAN. Schedules for clinical assessment in neuropsychiatry. Archives of General Psychiatry 1990; 47: 589–93.
15Guo, G, Wang, J. The mixed or multilevel model for behavior genetic analysis. Behavior Genetics 2002; 32: 37–49.
16SAS Institute, Inc.. SAS/STAT User's Guide, Version 8. Cary, NC: SAS Institute, Inc., 1999.
17Neale, MC, Maes, HH. Methodology for Genetic Studies of Twins and Families. Dordrecht: Kluwer Academic, 2004.
18Iachina, M, Jorgensen, B, Christensen, K, Iachine, I. Analysis of functional abilities for elderly Danish twins using GEE models. Twin Research 2002; 5: 289–93.
19Samaras, K, Kelly, PJ, Chiano, MN, Arden, N, Spector, TD, Campbell, LV. Genes versus environment. The relationship between dietary fat and total and central abdominal fat. Diabetes Care 1998; 21: 2069–76.
20Korkeila, M, Kaprio, J, Rissanen, A, Koskenvuo, M. Consistency and change of body mass index and weight. A study on 5967 adult Finnish twin pairs. International Journal of Obesity and Related Metabolic Disorders 1995; 19: 310–7.
21Harris, JR, Tambs, K, Magnus, P. Sex-specific effects for body mass index in the new Norwegian twin panel. Genetic Epidemiology 1995; 12: 251–65.
22Evans, DM, Martin, NG. The validity of twin studies. GeneScreen 2000; 1: 77–9.
23World Health Organization (WHO). Diet, Nutrition and the Prevention of Chronic Diseases. Report of the Joint WHO/Food and Agriculture Organization Expert Consultation. Geneva: WHO, 2003.
24Saris, WH, Blair, SN, Van Baak, MA, Eaton, SB, Davies, PS, Di Pietro, L, et al. How much physical activity is enough to prevent unhealthy weight gain? Outcome of the IASO 1st Stock Conference and consensus statement. Obesity Reviews 2003; 4: 101–14.
25Pietinen, P, Vartiainen, E, Mannisto, S. Trends in body mass index and obesity among adults in Finland from 1972 to 1992. International Journal of Obesity and Related Metabolic Disorders 1996; 20: 114–20.