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Hilfiker, Roger; Meichtry, Andre; Eicher, Manuela; Nilsson Balfe, Lina; Knols, Ruud H; Verra, Martin L; Taeymans, Jan (2018). a systematic review incorporating an indirect-comparisons meta-analysis British Journal of Sports Medicine, 52(10), pp. 651-658. PubMed Central 10.1136/bjsports-2016-096422