Authors: Alexander Gelbard; Yu Shyr; Lynne Berry; Alexander T Hillel; Dale C Ekbom; Eric S Edell; Jan L Kasperbauer; David G Lott; Donald T Donovan; C Gaelyn Garrett; Guri Sandhu; James J Daniero; James L Netterville; Josh S Schindler; Marshall E Smith; Paul C Bryson; Robert R Lorenz; David O Francis Journal: BMJ Open Date: 2018-04-10 Impact factor: 2.692