Postictal serotonin levels are associated with peri-ictal apnea. - Murugesan A; Rani MRS; Vilella L; Lacuey N; Hampson JP; Faingold CL; Friedman D; Devinsky O; Sainju RK; Schuele S; Diehl B; Nei M; et al. (Neurology, 2019)