PT - JOURNAL ARTICLE AU - Roger Collier TI - Sperm donor pool shrivels when payments cease AID - 10.1503/cmaj.109-3152 DP - 2010 Feb 23 TA - Canadian Medical Association Journal PG - 233--234 VI - 182 IP - 3 4099 - http://www.cmaj.ca/content/182/3/233.short 4100 - http://www.cmaj.ca/content/182/3/233.full SO - CMAJ2010 Feb 23; 182