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sms1509-sup-0001-si.doc41K

Supplementary file 1: Search strategy in four databases; Medline, Embase, CINAHL and SPORTDiscus.

sms1509-sup-0002-si.doc70K

Supplementary file 2: Checklist to identify relevant information related to quality items.

sms1509-sup-0003-si.doc181K

Supplementary file 3: Overview of characteristics of the 89 included studies.

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