title: Health hazards of mobile phones. Prevalence of headache is increased among users in Singapore.
authors.forename: S E
authors.initials: SE
authors.lastname: Chia
authors.forename: H P
authors.initials: HP
authors.lastname: Chia
authors.forename: J S
authors.initials: JS
authors.lastname: Tan
mesh_terms: D006261:Headache / Q000453:epidemiology*; D006304:Health Status; D006801:Humans; D015995:Prevalence; D012449:Safety; D012846:Singapore / Q000453:epidemiology; D013689:Telephone / Q000706:statistics & numerical data*