Charbit L, Mangin P, Rognin C, Cukier J
J Urol (Paris). 1983;89(4):247-9.
The authors undertook a double blind study in a group of 20 patients of the possible effectiveness of etretinate in the prevention of recurrences of superficial tumours of the bladder (with the exception of class IV carcinomas). No difference was seen in the course of the two series. These conclusions were not in agreement with those previously published.
作者对20名患者进行了一项双盲研究，以探讨维甲酸在预防膀胱浅表肿瘤（IV级癌除外）复发方面的可能疗效。两个系列的病程中未观察到差异。这些结论与先前发表的结论不一致。
