ifestyle treatments / H. Tuomilehto -- 20.Diabetes mellitus and obstructive sleep apnoea / Y. Peker -- 21.Enteral support at sleep time in Crohn's disease / T. Yamamoto -- Foods and nutrients and other factors that disturb sleep -- 22.Caffeine, sleep and sleepiness: withdrawal, dependence and tolerance / S. Heatherley -- 23.Alcohol and sleep / J. Foster -- 24.Vitamin D deficiency, sleep, sleep dis