Table 3.

Summary of the risk of bias within the three studies (screened for unbiased practices based on the 2005 Oxford standard [17].

Study	Was the Assignment of Patients to Treatments Randomized?	Were the Groups Similar at the Start of the Trial?	Aside from the Allocated Treatment, Were Groups Treated Equally?	Were All Patients Who Entered the Trial Accounted for?	Were Measures Objective or Were the Patients and Clinicians Kept “Blind” to Which Treatment Was Being Received?
Allen et al. [18]	Yes	Unclear	Yes	Yes	Unclear
Azma et al. [19]	Yes	Yes	Yes	Yes	Unclear
Bennell et al. [20]	Yes	Yes	Yes	Yes	Yes