“…Three papers were time series studies (level III-3 evidence), 7,9,10 two papers were case series, post-test (level IV evidence). 2,6 Seven articles could not be classified using the hierarchy of evidence table. 4,[11][12][13][14][15][16] Five of these were descriptions of the technique, 4,11,12,15,16 three of which repeated results described elsewhere 4,11,12 but with no additional results and insufficient detail to aid the review.…”