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Klaassen Z, Li K, Kassouf W, Black PC, Dragomir A, Kulkarni GS.Klaassen Z, et al.Can Urol Assoc J. 2017 Jun;11(6):173-181. doi: 10.5489/cuaj.4568.Can Urol Assoc J. 2017.PMID: 28652875Free PMC article.