“…17,18,22,25,[30][31][32]36,37,39,40,44,[46][47][48]50,57,58 Fourteen studies included a range of cancers and the rest focused on individual cancer types. 20,[22][23][24][25]30,32,36,39,40,44,46,47,50,57,58 There were 10 studies of breast cancer, [17][18][19][26][27][28][29]33,37,56 of which six studies were different secondary analyses of the same prospective clinical trial. 19,26,27,33 Similarly, two 34,51 of the ve lung cancer studies utilised the same retrospective database, 34,35,…”