Histamine N-methyltransferase inhibition as a novel therapeutic strategy for idiopathic hypersomnia. - Girgin B; Naganuma F; Hirano K; Fujiya M; Mimura T; Ebina R; Zhu R; Nishibe A; Nakamura T; Vetrivelan R; Miyoshi C; Mochizuki T; et al. (European journal of pharmacology, 2026)