Authors contributions

Study design: BN, GG, IK; Literature search: IK; Study selection, data collection: AD, AC,VM, EP, BN, GG; Quality assessment of studies: AD, AC, VM, BN, GG; GRADEing the certainty of evidence: GG; Narrative synthesis and data interpretation: BN, GG; Figures and tables: AD, AC, VM, EP, BN, GG; Writing the manuscript: BN; Supervision: GG; Critical revision and feedback to the manuscript: AD, AC, VM, EP, IK, GG