Comment in

• Commentary: Francis Galton and the twin method.

  Bulmer M. Bulmer M. Int J Epidemiol. 2012 Aug;41(4):911-3. doi: 10.1093/ije/dys096. Int J Epidemiol. 2012. PMID: 22933640 No abstract available.
• Commentary: The birth of the twin study--a commentary on Francis Galton's 'The history of twins'.

  Waller JC. Waller JC. Int J Epidemiol. 2012 Aug;41(4):913-7. doi: 10.1093/ije/dys100. Int J Epidemiol. 2012. PMID: 22933641 No abstract available.
• Commentary: Discussion of ‘The history of twins, as a criterion of the relative powers of nature and nurture' by Francis Galton (1875).

  Martin NG. Martin NG. Int J Epidemiol. 2012 Aug;41(4):917-9. doi: 10.1093/ije/dys110. Int J Epidemiol. 2012. PMID: 22933642 No abstract available.
• Commentary: Francis Galton, twins and intelligence.

  Gillham NW. Gillham NW. Int J Epidemiol. 2012 Aug;41(4):920-2. doi: 10.1093/ije/dys098. Int J Epidemiol. 2012. PMID: 22933643 No abstract available.