Grape seed proanthocyanidin extract alleviates urethral dysfunction in diabetic rats through modulating the NO-cGMP pathway. - Zhang, Bing; Zhang, Zhaocun; Ji, Hong; Shi, Hui; Chen, Shouzhen; Yan, Dongliang; Jiang, Xuewen; Shi, Benkang (Experimental & Therapeutic Medicine, 2018)