TY - JOUR T1 - An evaluation of class effect JF - Canadian Medical Association Journal JO - CMAJ SP - 502 LP - 502 DO - 10.1503/cmaj.1050129 VL - 174 IS - 4 AU - Bernard Prigent Y1 - 2006/02/14 UR - http://www.cmaj.ca/content/174/4/502.1.abstract ER -