
Botulinum toxin type A for the treatment of head and neck chronic myofascial pain syndrome
Keywords: آزمایش تصادفی کنترل شده; Myofascial pain; myofascial trigger points; botulinum toxin type A; visual analog scale; randomized controlled trials; meta-analysis; ACh; Acetylcholine; AE; Adverse event; BoTN-A; Botulinum toxin type A; GRADE; Grading of Recommendations, Assessment, Dev