Full text: Available Index: IMSEAR (South-East Asia) Main subject: Female / Humans / Male / Case-Control Studies / Chi-Square Distribution / Child / Child, Preschool / Population Surveillance / Incidence / Risk Factors Type of study: Etiology study / Incidence study / Observational study / Prognostic study / Risk factors / Screening study Country/Region as subject: Asia Language: English Journal: Indian J Pediatr Year: 1995 Type: Article