The prevalence of pica.
D000293:Adolescent; D001741:Black or African American; D002648:Child; D002675:Child, Preschool; D001068:Feeding and Eating Disorders / Q000453:epidemiology*; D005260:Female; D005386:Fingersucking / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D007223:Infant; D007855:Lead Poisoning / Q000453:epidemiology*; D008297:Male; D008404:Massachusetts; D044465:White People