Simplified dressing change after loose combined cutting seton surgery for high anal fistula: a prospective, single center randomized controlled study - Shan, Jiaying; Zheng, Lihua; Cheng, Yicheng; Shi, Yuying; Zhi, Congcong; Zhang, Yan; Sun, Yaxuan; Guo, Hongxin; Liu, Dun (Annals of Palliative Medicine, 2021)