RT Journal Article SR Electronic T1 Eyelid ptosis JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1074 OP 1074 DO 10.1503/cmaj.140579 VO 187 IS 14 A1 Colin W. McInnes A1 Matthew Lee-Wing YR 2015 UL http://www.cmaj.ca/content/187/14/1074.abstract