Joseph Tran, Edmund Tsui
Assessment of the Readability, Availability, and Quality of Online Patient Education Materials Regarding Uveitis Medications
Ocular immunology and inflammation
limited populationbased data occurrence williams syndrome estimated prevalence combining data two investigations one epidemiologic study originally designed assess prevalence etiology mental retardation among 30037 norwegian children born 1980 1985 living akershus county january 1 1993 investigation national survey williams syndrome first study 213 children referred evaluation whereas second study comprised 57 cases williams syndrome born 1970 1992 referred evaluation norwegian counties epidemiologic study revealed three children williams syndrome whereas one additional case complying demographic criteria identified national survey thus giving prevalence 1 7500 cases typical chromosome 7q1123 deletion detected also conclude williams syndrome uncommon cause mental retardation prevalence approximately 6 patients genetic etiology