a survey of frequency and type of medical errors done by nursing students of urmia medical sciences university in 1390 ebrahimi rigi tanha z [1] , baghaei r [2] , feizi a [3] * received: 16 nov, 2011 accepted: 5 jan, 2012 abstract background & aim: medication errors are among the most common medical errors. nursing students may commit these errors. thus, the aim of this study is t...