“… 5 , 10 , 18 , 23 - 25 , 32 , 38 , 42 , 49 , 56 , 61 , 62 , 66 , 76 , 78 - 80 , 83 Twenty-one studies were excluded because duration of follow-up was less than 2 years. 1 , 13 , 14 , 31 , 35 , 39 - 41 , 43 , 51 , 52 , 58 , 65 , 70 , 73 , 75 , 84 , 87 , 89 - 91 Three studies were excluded because they did not report on failure (2 reported on muscle strength and 1 on transplantation safety). 37 , 50 , 55 One study was excluded for not meeting the minimum treatment arm size of 15 patients.…”