20 Ablation of recurrent bladder tumors by cold plasma - First in human study - Z. Dotan; A.L. Luder; H.M. Mahmud; N.K. Kleinmann; D.F. Perezb; D.D. Dothanb; B.R. Rosenzweig; B.C. Chertin; M.L. Laufer (European Urology Open Science)