RT Journal Article SR Electronic T1 Age, sex, location … sperm count? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E347 OP E348 DO 10.1503/cmaj.109-4156 VO 184 IS 7 A1 Lauren Vogel YR 2012 UL http://www.cmaj.ca/content/184/7/E347.abstract