Table 1. Characteristics of the Included Studies.

Study	Country	Intervention	Sample Size	Follow-up (Weeks)	Outcome Measure	Appraisal Score
Yuan et al. ( 15 )	Taiwan	50 U Botox vs. 0.9% NS	18	12	VAS; PSQI; SF-36	10
Egila et al. ( 16 )	Egypt	50 U Botox vs. 0.9% NS	42	12	VAS; PSQI	7
Taheri et al. ( 17 )	Iran	150 U Dysport vs. 0.9% NS	141	4	VAS; NPS	10
Ghasemi et al. ( 7 )	Iran	100 U Dysport vs. 0.9% NS	40	3	VAS; NPS	10
Salehi et al. ( 18 )	Iran	100 U Dysport vs. 0.9% NS	32	12	VAS; NPS; PSQI; SF-36	10

Abbreviations: VAS, Visual Analog Scale; PSQI, Pittsburgh sleep quality index; SF-36, 36-item short form survey; NPS, Neuropathic Pain Scale; NS, normal saline.