Also, many of the patients who were randomized to the group that was to have surgery withdrew from the study without ever undergoing the surgical procedure.
而且，许多被随机安排入组进行手术的患者没有进入手术程序就退出了。
2
Thoughtful procedures for designing, distributing and breaking randomized code lists are emphasized as well as supervising the actualization of the randomization procedure worked out.
强调必须仔细设计随机化编码表的产生、分发和破盲的程序，同时应核查是否已遵循了所制定的随机化。
3
Combing the theory of interval minimum load cutting problem, the improved greedy randomized adaptive search procedure (GRASP) is used to solve this model.