TISU: Extracorporeal shockwave lithotripsy, as first treatment option, compared with direct progression to ureteroscopic treatment, for ureteric stones: study protocol for a random... oleh Samuel McClinton, Sarah Cameron, Kathryn Starr, Ruth Thomas, Graeme MacLennan, Alison McDonald, Thomas Lam, James N’Dow, Mary Kilonzo, Robert Pickard, Ken Anson, Frank Keeley, Neil Burgess, Charles Terry Clark, Sara MacLennan, John Norrie, for the TISU Study Group