Comment on

• Demographic and health surveys: a profile.

  Corsi DJ, Neuman M, Finlay JE, Subramanian SV. Corsi DJ, et al. Int J Epidemiol. 2012 Dec;41(6):1602-13. doi: 10.1093/ije/dys184. Epub 2012 Nov 12. Int J Epidemiol. 2012. PMID: 23148108
• Data resource profile: the Rochester Epidemiology Project (REP) medical records-linkage system.

  St Sauver JL, Grossardt BR, Yawn BP, Melton LJ 3rd, Pankratz JJ, Brue SM, Rocca WA. St Sauver JL, et al. Int J Epidemiol. 2012 Dec;41(6):1614-24. doi: 10.1093/ije/dys195. Epub 2012 Nov 18. Int J Epidemiol. 2012. PMID: 23159830 Free PMC article.
• Data resource profile: United Nations Children's Fund (UNICEF).

  Murray C, Newby H. Murray C, et al. Int J Epidemiol. 2012 Dec;41(6):1595-601. doi: 10.1093/ije/dys185. Epub 2012 Dec 3. Int J Epidemiol. 2012. PMID: 23211414 Free PMC article.
• Data resource profile: cardiovascular disease research using linked bespoke studies and electronic health records (CALIBER).

  Denaxas SC, George J, Herrett E, Shah AD, Kalra D, Hingorani AD, Kivimaki M, Timmis AD, Smeeth L, Hemingway H. Denaxas SC, et al. Int J Epidemiol. 2012 Dec;41(6):1625-38. doi: 10.1093/ije/dys188. Epub 2012 Dec 5. Int J Epidemiol. 2012. PMID: 23220717 Free PMC article.
• Data resource profile: the World Health Organization Study on global AGEing and adult health (SAGE).

  Kowal P, Chatterji S, Naidoo N, Biritwum R, Fan W, Lopez Ridaura R, Maximova T, Arokiasamy P, Phaswana-Mafuya N, Williams S, Snodgrass JJ, Minicuci N, D'Este C, Peltzer K, Boerma JT; SAGE Collaborators. Kowal P, et al. Int J Epidemiol. 2012 Dec;41(6):1639-49. doi: 10.1093/ije/dys210. Int J Epidemiol. 2012. PMID: 23283715 Free PMC article.