background: allergic diseases including asthma, allergic rhinitis (ar) and eczema are common chronic diseases in children. the purpose of this study was to determine the prevalence of asthma, ar and eczema in sari, iran. methods: this study was carried out on all elementary schools selected as a cluster from february 2010 to july 2010 in sari, north of iran. a questionnaire was provided accordi...

introduction: as other attempts for prevention of disease by vaccination or early diagnosis of asymptomatic diseases (by screening examination of children in several ages), search for early diagnosis of renal diseases that are treatable or preventable is continuing. our review of other researches showed several different and paradoxical results about it's cost benefit; some researchers advise e...