RT Journal Article SR Electronic T1 Synthesis of case reports for meta-assessment of causality JF BMJ Evidence-Based Medicine JO BMJ EBM FD BMJ Publishing Group Ltd SP bmjebm-2018-110969 DO 10.1136/bmjebm-2018-110969 A1 Patrick S Phelan YR 2018 UL http://ebm.bmj.com/content/early/2018/05/30/bmjebm-2018-110969.abstract AB