In Commemorating One Thousandth Anniversary of the Avicenna’s Canon of Medicine: Gastric Headache, A Forgotten Clinical Entity from the Medieval Persia - Fazljou, Seyyed Mohammad Bagher; Togha, Mansoureh; Ghabili, Kamyar; Alizadeh, Mahdi; Keshavarz, Mansoor (Acta Medica Iranica)