Re: Results of sacral neuromodulation therapy for urinary voiding dysfunction: outcomes of a prospective, worldwide clinical study. P. E. van Kerrebroeck, A. C. van Voskuilen, J. P. Heesakkers, A. A. Lycklama a Nijholt, S. Siegel, U. Jonas, C. J. Fowler, M. Fall, J. B. Gajewski, M. M. Hassouna, F. Cappellano, M. M. Elhilali, D. F. Milam, A. K. Das, H. E. Dijkema and U. van den Hombergh. J Urol 2007; 178: 2029-2034.