*Denotes high-quality review.

A—search methods were explicitly described to allow replication; B—adequate number and range of databases searched; C—adequate alternate searches applied; D—adequate range of key words applied; E—no language restrictions applied; F—inclusion criteria explicitly described to allow replication; G—excludes studies which do not adequately address exclusion of non-PFP diagnosis; H—use of two independent reviewers during search; I—valid quality assessment explicitly described; J—valid meta-analysis completed or limitations to homogeneity discussed; K—CIs/effect sizes reported where possible; L—conclusions supported by meta-analysis or other data analysis; M—conclusions address levels of evidence for each intervention/comparison.