Alexoudi, A., Politis, K., Moukidou, A., Tsatovidou, R., Ververaki, S., Tavernarakis, A., Siatouni, A., Verentzioti, A., Mitsikostas, D., & Gatzonis, S. (2018). Variables affecting factors associated with primary headache. Clinics and Practice, 8(1). https://doi.org/10.4081/cp.2018.1031