Rassweiler JJ, Knoll T, Köhrmann KU, McAteer JA, Lingeman JE, Cleveland RO, Bailey MR, Chaussy C.
Department of Urology, Klinikum Heilbronn, SLK Kliniken Heilbronn, University of Heidelberg, Heilbronn, Germany.

Falahatkar S, Khosropanah I, Vajary AD, Bateni ZH, Khosropanah D, Allahkhah A.
Department of Urology, Urology Research Center, Guilan University of Medical Sciences, Rasht, Iran.

Zehnder P, Roth B, Birkhäuser F, Schneider S, Schmutz R, Thalmann GN, Studer UE.
Department of Urology, University of Bern, Bern, Switzerland.