American Journal of Epidemiology (Vol. 175, No. 4, Feb. 15, 2012).
aje.oxfordjournals.org/content/vol175/issue4/index.dtl?etoc
Reviews in Clinical Gerontology (Vol. 22, No. 2, May 2012).
journals.cambridge.org/action/displayIssue?jid=RCG&tab=currentissue
Research on Aging (Vol. 34, No. 2, March 2012).
