TY - JOUR T1 - Erasers JF - Canadian Medical Association Journal JO - CMAJ SP - 689 LP - 689 DO - 10.1503/cmaj.121787 VL - 185 IS - 8 AU - Janny Xue Chen Ke Y1 - 2013/05/14 UR - http://www.cmaj.ca/content/185/8/689.abstract ER -