TY - JOUR T1 - Vitamin D insufficiency: no recommended dietary allowance exists for this nutrient JF - Canadian Medical Association Journal JO - CMAJ SP - 1541 LP - 1542 VL - 166 IS - 12 AU - Reinhold Vieth AU - Donald Fraser Y1 - 2002/06/11 UR - http://www.cmaj.ca/content/166/12/1541.abstract ER -