Title {1}	Anal fistulotomy with one-stage shaped skin grafting for intersphincter anal fistula: study protocol for a multicentre random controlled trial
Trial registration {2a and 2b}	2a: The technique of anal fistulotomy with shaped skin harvesting and grafting at the surgical wound in one stage for healing the low simple intersphincter anal fistula: study protocol for a multicentre random controlled trial 2b: Chinese Clinical Trial Register, ID: ChiCTR2000039174. Registered on 28 October 2020
Protocol version {3}	15 April 2020, Version 5.0
Funding {4}	This study was funded by the Innovation Strong Hospital Project of the First Affiliated Hospital of Guangzhou University of Chinese Medicine and Science and Technology Projects in Guangzhou
Author details {5a}	aDepartment of Anorectal Surgery of the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510,000, China;Doctorate with Equivalent Academic Qualification of Guangzhou University of Chinese Medicine bDoctorate with Equivalent Academic Qualification of Guangzhou University of Chinese Medicine;Department of Gastrointestinal Surgery, Guangzhou Panyu Hexian Momerial Hospital,Guangzhou 510,000, China c Department of Anorectal Surgery of Dongguan People’s Hospital,Dongguan 523,000, China dDepartment of Anorectal Surgery of Jiangmen Wuyi Hospital of Chinese Medicine,Jiangmen 529,000, China eSchool of Basic Medical Science, Guangzhou University of Chinese Medicine,Guangzhou 510,000, China fDepartment of Anorectal Surgery of the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510,000, China
Name and contact information for the trial sponsor {5b}	The First Affiliated Hospital of Guangzhou University of Chinese Medicine, 16th Jichang Road, Guangzhou 510,405, China Guangzhou Municipal Science and Technology Bureau,1st Fuqian Road, Guangzhou 510,030, China
Role of sponsor {5c}	The sponsors played no part in study design, collection, management, analysis and data interpretation; report writing and deciding to submit the report for publication