“…34,35,45,47,59 Selection of patients Reasons for exclusion were that same patients were used before in another included article, 32,41 no kinematics, 22,38,54 no RF injection, 21,23,[25][26][27][28]39,50 and no full text available in English. 24,29,31,33,36,37,43,44,48,49,[51][52][53][55][56][57][58]60 There was no disagreement in the selection of the remaining 9 articles 30,34,35,40,42,[45][46][47]59 between the 2 reviewers. The flow diagram of study retrieval and selection is presented in figure 1.…”