2015. Supplementum 209: Joint Annual Meeting of the Swiss Society of Paediatrics (SSP) and the Swiss Society for Sleep Research, Sleep Medicine and Chronobiology (SSSSC) (Interlaken, Switzerland, June 11-12, 2015). Swiss Medical Weekly. 145, 2122 (May 2015), Suppl. 209. DOI:https://doi.org/10.4414/smw.2015.w30261.