The clinical assessment of propranolol vs. divalproex sodium in the prophylaxis of migraine at a tertiary centre in Bihar . Journal of Pharmaceutical Negative Results, [S. l.], p. 658–662, 2023. DOI: 10.47750/pnr.2023.14.03.084. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/8094.. Acesso em: 13 jun. 2026.