Age-dependent association of exposure to television screen with children's urinary melatonin excretion? Salti R, Tarquini R, Stagi S, Perfetto F, Cornélissen G, Laffi G, Mazzoccoli G, Halberg F. Journal Article 2006; 27(1-2): 73-80 PubMed PMID: 16648813 Keywords: Adolescent, Aging:metabolism, Child, Electromagnetic Fields:adverse effects, Female, Humans, Male, Melatonin:urine, Sex Characteristics, Television,. Citation OBJECTIVES: Changes in magnetic field are associated with a decrease in nocturnal urinary melatonin excretion. Television screens emit low..... Read abstract