Hatef, B., Hashemirad, F., Meftahi, G.H., Simorgh, L., Jahromi, S.R., Rahimi, F. and Togha, M. 2016. The efficiency of pulsed electromagnetic field in refractory migraine headaches: a randomized, single-blinded, placebo-controlled, parallel group. International Journal of Clinical Trials. 3, 1 (Feb. 2016), 24–31. DOI:https://doi.org/10.18203/2349-3259.ijct20160475.