“…in 3 of 9 studies, irradiation therapy was composed of only radiotherapy (n = 146) 13,15,16 ; chemoradiation only was given in 3 studies (n = 124), [17][18][19] and in the remaining 3 studies, either radiotherapy (n = 103) or chemoradiation (n = 93) was given. 11,20,21 in most studies, eBRt for the primary tumor was given preoperatively in 2 studies, 11,20 either preoperatively or postoperatively in 3 studies, 18,19,21 and the timing of eBRt was undefined in 4 studies, 13,[15][16][17] (preoperative, n = 203; postoperative, n = 66; unknown, n = 197).…”