TY - JOUR T1 - Tough night for call JF - Canadian Medical Association Journal JO - CMAJ SP - 263 LP - 263 DO - 10.1503/cmaj.1040452 VL - 171 IS - 3 AU - Amrita Burdick Y1 - 2004/08/03 UR - http://www.cmaj.ca/content/171/3/263.abstract ER -