参考
Wexner, edited by Andrew P. Zbar, Steven D. (2010). Coloproctology. New York: Springer. ISBN 978-1-84882-755-4.
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Wexner, edited by Andrew P. Zbar, Steven D. (2010). Coloproctology. New York: Springer. p. 140. ISBN 978-1-84882-755-4.