Re: (11C)Choline Positron Emission Tomography/Computerized Tomography to Restage Prostate Cancer Cases With Biochemical Failure After Radical Prostatectomy and No Disease Evidence on Conventional Imaging G. Giovacchini, M. Picchio, A. Briganti, C. Cozzarini, V. Scattoni, A. Salonia, C. Landoni, L. Gianolli, N. Di Muzio, P. Rigatti, F. Montorsi and C. Messa J Urol 2010; 184: 938-943