Roles and responsibilities
Task	Who undertook the task?
Protocol stage: draft the protocol	Yi Liu; Cristina Santoro; Armando Rodriguez
Review stage: perform the searches	Yi Liu; Cristina Santoro; Jie Song; Cochrane Cystic Fibrosis and Genetic Disorders Group
Review stage: perform the discussion	Yi Liu; Lingli Zhang; Cristina Santoro
Review stage: perform the conclusion	Yi Liu; Lingli Zhang; Li Wang
Review stage: draft the final review	Yi Liu; Lingli Zhang; Jie Song; Armando Rodriguez
Update stage: update the review	Lucan Jiang; Yi Liu; Lingli Zhang; Cristina Santoro; Armando Rodriguez