Roles and responsibilities
TASK	WHO WILL UNDERTAKE THE TASK?
Protocol stage: draft the protocol	Valerie Waters
Review stage: select which trials to include (2 + 1 arbiter)	Valerie Waters and Felix Ratjen (+ Nikki Jahnke)
Review stage: extract data from trials (2 people)	Valerie Waters and Felix Ratjen
Review stage: enter data into RevMan	Valerie Waters
Review stage: carry out the analysis	Valerie Waters and Felix Ratjen
Review stage: interpret the analysis	Valerie Waters and Felix Ratjen
Review stage: draft the final review	Valerie Waters and Felix Ratjen
Update stage	Valerie Waters, Felix Ratjen, Sherie Smith, Nikki Jahnke NJ extracted data and assessed risk of bias for Yau 2014 Sherie Smith generated the Summary of Findings table and incorporated the GRADE findings into the text of the review