AU - Buchman AS, Boyle PA, Wilson RS, Fleischman DA, Leurgans SE, Bennett DA TI - LAte-life social activity—reply PT - JOUR DP - 2009 TA - Archives of Internal Medicine pages = {1932}, VI - 169 IP - 20 AID - 10.1001/archinternmed.2009.409 [doi] 4100 - http://dx.doi.org/10.1001/archinternmed.2009.409 SO - Archives of Internal Medicine November 9, 2009 169(20):1932