RESULTS	The duration of the operations were 54.35 ( 50-82 ) minutes , and 82.15 ( 73-180 ) minutes ( P < 0.0001 ) ; and the average hospital stay days were 2.6 ( 2-5 ) and 3.5 ( 3-8 ) days ( p = 0.011 ) in groups PNL and LUL , accordingly .\