9Wiener DP, Koss LG, Sablay B, et al. The prevalence and significance of Brunn ' s nests, cystitis cystica and squamous metaplasia in normal bladders. J U rel, 1979,122 : 317 -321.
4lost SP, Dixon iS, Gosling JA, et al. Ultrastructural observations on cystitis cystica in human bladder urothelium. Br J Urol, 1993, 71(1): 2833.
5Alderson P, Green S, Higgins JPT, et al. Cochrane Reviewers' Hand- book 4.2.2[updated March 2004]. The Cochrane Library, Issue 1, 2004.
6Wells GA, Shea B, O'Connell D, et al. The Newcastle-Ottawa Scale (NOS) for assessing the quality if nonrandomized studies in meta- analyses. Available from: URL:http:l/www.ohri.calprograms/clini- cal epidemiology/oxford.htm.
8Walther MM, Campbell WG Jr, O Brien DP 3rd, et al. Cystitis cysti- ca an electron and immune fluorescence microscopic study. J Urol, 1987, 137(4): 764-768.