Although Ahmed et al. report anti-HCRTR2 autoantibodies in the majority of post-Pandemrix narcolepsy patients tested (17 of 20 sera)38, others utilizing a similar protocol have reported conflicting results in both sporadic narcolepsy patients (5 of 181, 3 of 61 sera) and post-Pandemrix narcolepsy patients (0 of 40 sera)37. Here, HCRTR2 is linked to narcolepsy.