Catalogue of knowledge and skills for sleep medicine. - Penzel, T; Pevernagie, D; Dogas, Z; Grote, L; de Lacy, S; Rodenbeck, A; Bassetti, C; Berg, S; Cirignotta, F; d'Ortho, M; Garcia-Borreguero, D; Levy, P; et al. (Journal of sleep research, 2014)