TY - JOUR T1 - Endoscopic retrograde cholangiopancreatography JF - Canadian Medical Association Journal JO - CMAJ SP - 531 LP - 533 VL - 125 IS - 6 AU - W. T. Depew Y1 - 1981/09/15 UR - http://www.cmaj.ca/content/125/6/531.abstract ER -