HCRTR2 and narcolepsy: In this study, we further evaluated these hypotheses by (1) examining the prevalence of NP 116I and 116M in Pandemrix®, Arepanrix® and Focetria® using MS characterization and (2) testing for the presence of anti-HCRTR2 autoantibodies using three independent strategies in post Pandemrix® narcolepsy (PP-N) patients, recent early onset narcolepsy (EO-N) patients, post Pandemrix® controls (PP-C), and other controls (O-C).