Coelho, A., Cruz, F., Cruz, C. D., & Avelino, A. (2012). Reply from Authors re: Prokar Dasgupta. Volume matters: Bladder injections of botulinum toxin type A. Eur Urol 2012;61:1185-6: Yes, Volume matters: Bladder injections of botulinum toxin type A. European Urology, 61(6), 1186 - 1187.