RT Journal T1 POtential safety signals and their significance—reply JF Archives of Internal Medicine JO Archives of Internal Medicine YR 2012 FD May 14 VO 172 IS 9 SP 747 OP 748 DO 10.1001/archinternmed.2012.1035 UL http://dx.doi.org/10.1001/archinternmed.2012.1035 AB