TI - CLinical trial registration PT - JOUR DP - 2006 TA - Archives of Internal Medicine pages = {111}, VI - 166 IP - 1 AID - 10.1001/archinte.166.1.111 [doi] 4100 - http://dx.doi.org/10.1001/archinte.166.1.111 SO - Archives of Internal Medicine January 9, 2006 166(1):111