[No cell phone, computer or tablet before going to bed!].
D040421:Cell Phone; D003430:Cross-Sectional Studies; D006306:Health Surveys; D006801:Humans; D008838:Microcomputers; D012307:Risk Factors; D012892:Sleep Deprivation / Q000453:epidemiology / Q000209:etiology* / Q000517:prevention & control*; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology / Q000209:etiology* / Q000517:prevention & control*; D006113:United Kingdom; D018910:Video Games / Q000009:adverse effects*