PT - JOURNAL ARTICLE AU - Shuchman, Miriam TI - Frequent blood donors risk iron deficiency AID - 10.1503/cmaj.109-4807 DP - 2014 Jan 01 TA - Canadian Medical Association Journal PG - cmaj.109-4807 4099 - http://www.cmaj.ca/content/early/2014/06/30/cmaj.109-4807.short 4100 - http://www.cmaj.ca/content/early/2014/06/30/cmaj.109-4807.full