Zucconi, M., Ferri, R., Allen, R., Baier, P. C., Bruni, O., Chokroverty, S., et al. (2006). The official World Association of Sleep Medicine (WASM) standards for recording and scoring periodic leg movements in sleep (PLMS) and wakefulness (PLMW) developed in collaborations with a task force from the International Restless Legs Syndrome Study Group (IRLSSG). Sleep Medicine, 7, 175-183.