5. Critical review form (studies with non‐randomised controls).

No.	Data extraction	Yes/No
1.	Did study population meet our criteria? or: is it possible to analyse patients that meet our criteria separately?
2.	Were patients analysed in the groups to which they were assigned?
3.	Were the groups similar before treatment?
4.	Aside from the experimental intervention, were the groups treated equally?
5.	Were all patients accounted for at the end of follow up?
6.	How long was follow up?
7.	Were interventions defined adequately?