RT Journal Article SR Electronic T1 Irregular menstrual cycles in a young woman JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 850 OP 852 DO 10.1503/cmaj.130667 VO 186 IS 11 A1 Boyle, Jacqueline A. A1 Teede, Helena J. YR 2014 UL http://www.cmaj.ca/content/186/11/850.abstract AB