Subject(s)

Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Anal Canal/abnormalities , Rectum/abnormalities , Anus Diseases/surgery , Anus Diseases/diagnosis , Anus Diseases/history , Anus Diseases/mortality , Rectal Diseases/surgery , Rectal Diseases/diagnosis , Rectal Diseases/history , Rectal Diseases/mortality