“…24 Seven studies were from North America, 25-31 two from East Asia 32,33 and 17 from Europe, 28,34-49 12 were singlecentre 26,29,32,33,35,[41][42][43]46,48,[48][49][50] and 12 multicentre trials 27,28,30,31,36,37,39,40,44,45,47,51 and in two data were not reported. 25,38 There were two studies which reported only TKR patients, 32,33 11 THR patients, [34][35][36][37][38][39][40][41][42][43]50 11 both THR and TKR patients, [26][27][28][29][44][45][46][47][48][49][50] one THR, TKR and other undefined ...…”