The complexity and challenges of the International Classification of Diseases, Ninth Revision, Clinical Modification to International Classification of Diseases, 10th Revision, Clinical Modification transition in EDs - Krive, J; Patel, M; Gehm, L; Mackey, M; Kulstad, E; Li, JJ; Lussier, YA; Boyd, AD (The American journal of emergency medicine, 2015)