“…In 4 trials, treatment duration was at the therapist's discretion, and details of treatment duration were not provided. [22][23][24][25][30][31][32][33][34] Eleven trials analyzed only the efficacy of high-velocity thrust manipulation techniques, 16,26,27,[30][31][32][35][36][37][38][39][40][41][42] 8 trials analyzed the efficacy of high-velocity thrust techniques in association with other techniques, 17,43-49 7 trials assessed a combination of high-velocity thrust manipulation and low-velocity mobilization techniques, [22][23][24][25]28,29,33,34,[50][51][52] and 1 trial compared different techniques of spinal manipulative therapy. 53…”