Sullivan, PF, Neale, MC, Kendler, KS. Genetic epidemiology of major depression: review and Meta-analysis. Am J Psychiatry
2000; 157: 1552–62.
Kendler, KS, Gardner, CO, Neale, MC, Prescott, CA. Genetic risk factors for major depression in men and women: similar or different heritabilities and same or partly distinct genes?
2001; 31: 605–16.
Kendler, KS, Gatz, M, Gardner, CO, Pedersen, NL. A Swedish national twin study of lifetime major depression. Am J Psychiatry
2006; 163: 109–14.
Middeldorp, CM, Birley, AJ, Cath, D, Gillespie, NA, Willemsen, G, Statham, DJ, et al. Familial clustering of major depression and anxiety disorders in Australian and Dutch twins and siblings. Twin Res Hum Genet
2005; 8: 609–15.
McGuffin, P, Katz, R, Watkins, S, Rutherford, J. A hospital-based register of the heritability of DSM-IV unipolar depression. Arch Gen Psychiatry
1996; 53: 129–36.
Prince, M, Patel, V, Saxena, S, Maj, M, Maselko, J, Phillips, MR, et al. No health without mental health. Lancet
2007; 370: 859–77.
Rutter, M, Moffitt, TE, Caspi, A. Gene-environment interplay and psychopathology: multiple varieties but real effects. J Child Psychol Psychiatry
2006; 47: 226–61.
Kendler, KS, Karkowski-Shuman, L. Stressful life events and genetic liability to major depression: genetic control of exposure to the environment?
1997; 27: 539–47.
Thapar, A, Harold, G, McGuffin, P. Life events and depressive symptoms in childhood – shared genes or shared adversity? A research note. J Child Psychol Psychiatry
1998; 39: 1153–8.
Siribaddana, S, Ball, H, Hewage, S, Glozier, N, Kovas, Y, Dayaratne, DARK, et al. Colombo Twin and Singleton Study (CoTASS). A description of a population based twin study of mental disorders in Sri Lanka. BMC Psychiatry
2008; 8: 49.
Jayasekara, RS, Schultz, T. Health status, trends, and issues in Sri Lanka. Nurs Health Sci
2007; 9: 228–33.
Ball, HA, Siribaddana, SH, Kovas, Y, Glozier, N, McGuffin, P, Sumathipala, A, et al. Epidemiology and symptomatology of depression in Sri Lanka. A cross-sectional population-based survey in Colombo District. J Affect Disord
World Health Organization. Composite International Diagnostic Interview (CIDI). WHO, Division of Mental Health, 1990.
American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders (4th edn, revised) (DSM–IV–TR). APA, 2000.
Ooki, S, Yamuda, K, Asaka, A, Hayakawa, K. Zygosity diagnosis of twins by questionnaire. Acta Genet Med Gemellol (Roma)
1990; 39: 109–15.
Sumathipala, A, De Silva, N, Siribaddana, SH, Abeysingha, MR, Fernando, DJ. Cross-cultural adaptation and preliminary validation of a zygosity determination questionnaire for twins in Sri Lanka. Twin Res Hum Genet
2000; 3: 205–12.
Rijsdijk, FV, Sham, PC. Analytic approaches to twin data using structural equation models. Brief Bioinform
2002; 3: 119–33.
Reynolds, CA, Fiske, A, Fratiglioni, L, Pedersen, NL, Gatz, M. Heritability of an age-dependent categorical phenotype: cognitive dysfunction. Twin Res Hum Genet
2006; 9: 17–23.
Hur, YM. Sex differences in genetic and environmental contributions to depression symptoms in South Korean adolescent and young adult twins. Twin Res Hum Genet
2008; 11: 306–13.
Goldney, RD, Fisher, LJ, Hawthorne, G. Depression and the CIDI. Br J Psychiatry
2004; 185: 518–9.
Hsu, E, Davies, CA, Hansen, DJ. Understanding mental health needs of Southeast Asian refugees. Historical, cultural, and contextual challenges. Clin Psych Rev
2004; 24: 193–213.
Kornstein, SG, Schatzberg, AF, Thase, ME, Yonkers, KA, McCullough, JP, Keitner, GI, et al. Gender differences in chronic major and double depression. J Affect Disord
2000; 60: 1–11.
Middeldorp, CM, Wray, NR, Andrews, G, Martin, NG, Boomsma, DI. Sex differences in symptoms of depression in unrelated individuals and opposite-sex twin and sibling pairs. Twin Res Hum Genet
2006; 9: 632–6.
Goldstein, DB, Chikhi, L. Human migrations and population structure: what we know and why it matters. Annu Rev Genomics Hum Genet
2002; 3: 129–52.
Summerfield, D. Depression: epidemic or pseudo-epidemic?
J R Soc Med
2006; 99: 161–2.
Patel, V, Araya, R, de Lima, M, Ludermir, A, Todd, C. Women, poverty and common mental disorders in four restructuring societies. Soc Sci Med
1999; 49: 1461–71.
Simon, GE, Goldberg, DP, Von, KM, Ustun, TB. Understanding cross-national differences in depression prevalence. Psychol Med
2002; 32: 585–94.
Foley, DL, Neale, MC, Kendler, KS. Reliability of a lifetime history of major depression: implications for heritability and co-morbidity. Psychol Med
1998; 28: 857–70.
Wells, JE, Horwood, LJ. How accurate is recall of key symptoms of depression? A comparison of recall and longitudinal reports. Psychol Med
2004; 34: 1001–11.
Kendler, KS, Neale, MC, Kessler, RC, Heath, AC, Eaves, LJ. A test of the equal-environment assumption in twin studies of psychiatric illness. Behav Genet
1993; 23: 21–7.
Kendler, KS, Prescott, CA. A population-based twin study of lifetime major depression in men and women. Arch Gen Psychiatry
1999; 56: 39–44.