There was a significant variation in preoperative A/B-antibody titer between the centers, with a median 1:8 in Uppsala, median 1:32 in Stockholm and median 1:128 in Freiburg.

• 在三个测试中心间，两组在术前A/B抗体滴度上有显着差异，乌普萨拉中位数1:8，斯德哥尔摩中位数1:32和浮雷堡中位数1:128。