%0 Journal Article %B Int J Qual Health Care %D 2009 %G eng %N 4 %P 292-300 %R 10.1093/intqhc/mzp023 %T Analysis of unintended events in hospitals: inter-rater reliability of constructing causal trees and classifying root causes. %V 21 %1 https://www.ncbi.nlm.nih.gov/pubmed/19542181 %8 08/2009