“…The 19 published articles described 16 different studies: Radbruch 29 presented the aggregated data from Bohme, 28 Sittl, 31 and Sorge; 32 Evans reported efficacy and safety data by pooling the 3 placebo-controlled RCTs; 25 and Radbruch 30 and Apolone 35 reported the preliminary information later published by Griessinger 33 and Apolone, 46 respectively. Nine were clinical trials 28,31,32,37,[39][40][41][42]44 and 7 were observational (non-intervention) studies. 33,34,36,38,43,45,46 Most of the papers reported data from a mixed population including both cancer and non-cancer patients (12/19).…”