TI - WHite swans PT - JOUR DP - 2012 TA - Archives of Internal Medicine pages = {1256}, VI - 172 IP - 16 AID - 10.1001/archinternmed.2012.2850 [doi] 4100 - http://dx.doi.org/10.1001/archinternmed.2012.2850 SO - Archives of Internal Medicine September 10, 2012 172(16):1256