TABLE I.

Literature search results (1975 to June 2011)

Search stage	Articles found
medline, embase, and Cochrane Library initial search	573
Ordered for full publication	187
Abstracts from conference proceedings	1
Articles found in hand-search of reference lists	1
Articles included in this report	33
Articles and guidelines that outline margin criteria (question 1)	32 (28 studies, 4 guidelines)
Articles and guidelines that describe proper handling of specimens (question 1)	4 (3 guidelines, 1 protocol)