Frost F, Griffiths P, Brockelsby C, Lynch C, Walshaw MJ, Nazareth D.
Adult CF Centre, Liverpool Heart and Chest Hospital, Liverpool, UK.
Urology Department, Royal Liverpool and Broadgreen University Hospital, Liverpool, UK.

Dobrowiecka K, Przekora J, Jobs K, Kowalczyk K, Plewka K, Paturej A, Kalicki B.
Student Scientific Society of the Department of Paediatrics, Department of Paediatrics Nephrology and Allergology of the Military Institute of Medicine, Warsaw, Poland.

Moen T, Ferrero A, McCollough C.
Department of Radiology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905.

Kim CH, Shin DS, Kim TB, Jung H.
Department of Urology, Clinical Trials Center, Gachon University Gil Medical Center, Gachon University College of Medicine, Republic of Korea.

Bozkurt A, Mertoglu C, Karabakan M, Siranli G, Yurt EF, Erel O.
Department of Clinical Biochemistry, Faculty of Medicine, Department of Urology, Erzincan University, Erzincan, Turkey.
Department of Clinical Biochemistry, Faculty of Medicine, Yildirim Beyazit University, Ankara, Turkey.