المؤلفون: Snell, Sarah B., Gaar, Earl E., Stevens, Scott P., Flynn, Michael B.

المصدر: The American Surgeon ; volume 69, issue 8, page 711-716 ; ISSN 0003-1348 1555-9823

الاتاحة: https://doi.org/10.1177/000313480306900813
http://journals.sagepub.com/doi/pdf/10.1177/000313480306900813