Co-Occurrence of SCN9A and PRRT2 Variants in a Patient With Paroxysmal Extreme Pain Disorder, Contradictory Analgesia, and Intractable Paroxysmal Non-Kinesigenic Dyskinesia. - Ikeda M; Kawashima A; Kodama K; Sato R; Uneoka S; Katata Y; Okubo Y; Endo W; Inui T; Togashi N; Mizuno C; Yaoita H; et al. (Case reports in medicine, 2026)