Islam, M. A.; Shaikh, A. K.; Alam, S. M.; Sultana, D.; Islam, M. S.; Rashid, M. M. Safety & Efficacy of Propranolol and Amitriptyline Combination Therapy in Migraine Prophylaxis: A Randomized Control Trial. J. Natl Inst. Neurosci Bangladesh 2018, 4, 3-7.