Hadianfard, M. ., A. . Rahimi-Jaberi, and S. . Kazemilar. “The Effect of Methylprednisolone Acetate Injection at Cervical Trigger Points in Chronic As Well As Drug Resistant Headache”. JPMRE, vol. 1, no. 2, June 2019, pp. 69-74, doi:10.22122/pmre.v1i2.22.