Rating Scheme for the Strength of the Recommendations
Level-of-Evidence Rating for Recommendations
Level A: Two or more supporting RCTs of at least 10 humans with lower extremity venous ulcers (at Levels I or II), a meta-analysis of RCTs, or a Cochrane systematic review of RCTs
Level B: One or more supporting controlled trials of at least 10 humans with lower extremity venous ulcers or two or more supporting non-randomized trials of at least 10 humans with lower extremity venous ulcers (at Level III)
Level C: Two supporting case series of at least 10 humans with lower extremity venous ulcers or expert opinion