“…Of these, only 16 were randomized trials (63,64,66,68,78,84,128,130,(135)(136)(137)(138)140,162,163,166,167,169) and 19 were non-randomized studies (46,47,57,67,73,79,129,132,134,144,152,154,155,158,159,164,168,170,171). The remaining 16 non-random-ized studies were performed without fluoroscopy (58,69,70,131,133,143,145,148,150,151,153,156,157,…”