“…CPR was available from all the 49 trials. 13 reported LBR (30, 32-35, 38, 41, 43-46, 50, 60, 74) and 10 studies provided OPR data (31,32,39,43,44,46,(51)(52)(53)56). 27 studies were performed in China (33, 34, 37, 38, 41, 44, 46, 49, 55-74, 76, 77), 9 in Europe (7,35,43,51,52,(54)(55)(56)75), 4 in USA (42,47,48,50), and the remaining were in other country.…”