NOS3 and autosomal dominant polycystic kidney disease: Twenty-nine articles were fully reviewed, of which 9 papers with 520 ADPKD patients with ESRD and 563 ADPKD patients without ESRD for the NOS3 894G>T polymorphism8,10-12,14-18 and 5 papers with 185 ADPKD patients with ESRD and 223 ADPKD patients without ESRD for NOS3 intron 4a/b polymorphism7,9,11,19,20 that had sufficient data were included in the present meta-analysis.