Value of preoperative ureteral wall thickness in prediction of impaction of ureteric stones stratified by size in laser ureteroscopic lithotripsy oleh Abdrabuh M. Abdrabuh, El-Sayed I. El-Agamy, Mohamed A. Elhelaly, Tamer A. Abouelgreed, Ibrahim Abdel-Al, Hamada A. Youssof, Adel Elatreisy, Osama Shalkamy, Mohamed Elebiary, Mohammed Agha, Ibrahim Tagreda, Ahmed Alrefaey, Elsayed Elawadey