A STATISTICAL SURVEY OF PEPTIC ULCER.
D000293:Adolescent; D002648:Child; D003625:Data Collection; D005853:Geriatrics; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010437:Peptic Ulcer; D013223:Statistics as Topic
ADOLESCENCE; CHILD; GERIATRICS; INFANT; INFANT, NEWBORN; PEPTIC ULCER; STATISTICS