The impact of hypsarrhythmia on infantile spasms treatment response: Observational cohort study from the National Infantile Spasms Consortium. - Demarest ST; Shellhaas RA; Gaillard WD; Keator C; Nickels KC; Hussain SA; Loddenkemper T; Patel AD; Saneto RP; Wirrell E; Sánchez Fernández I; Chu CJ; et al. (Epilepsia, 2017)