RT Journal Article SR Electronic T1 Long-term use of diphenhydramine JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1078 OP 1078 DO 10.1503/cmaj.1150066 VO 187 IS 14 A1 H.C. George Wong YR 2015 UL http://www.cmaj.ca/content/187/14/1078.2.abstract