1	exp urinary bladder neoplasms/
2	(bladder* adj3 (cancer* or carcinoma* or neoplas* or tumo?r* or malignan*)).tw.
3	1 or 2
4	BCG vaccine/
5	(bacillus calmette guerin or BCG or calmette guerin).mp.
6	(calmette* adj3 vaccine*).mp.
7	or/4‐6
8	Mitomycin/
9	50SG953SK6.rn.
10	(mitomycin or mitocinc or mitocin c or ametycine or mutamycin or mitocin‐c or nsc26980 or nsc‐26980 or nsc 26980 or mitomycin‐c).mp.
11	or/8‐10
12	3 and 7 and 11
13	randomized controlled trial.pt.
14	controlled clinical trial.pt.
15	randomized.ab.
16	placebo.ab.
17	drug therapy.fs.
18	randomly.ab.
19	trial.ab.
20	groups.ab.
21	or/13‐20
22	exp animals/ not humans.sh.
23	21 not 22
24	12 and 23