Table 2.

Studies excluded from analysis as primarily reports of ex vivo biopsy techniques.

Entirely ex vivo technique			In vivo injection but ex vivo identification of mapped nodes
Lead Author	Year	Journal	Lead Author	Year	Journal
Wong [28]	2001	Ann Surg	Cserni [38]	1999	Path Oncol Res
Fitzgerald [29]	2002	J Surg Oncol	Joosten [39]	1999	Br J Surg
Broderick-Villa [30]	2004	Am Surg	Merrie [40]	2001	Dis Colon Rectum
Wong [31]	2004	Ann Surg Oncol	Gandy [41]	2002	Colorectal Dis
Smith F [32]	2005	Ann Surg Oncol	Evangelista [42]	2002	Tumori
Bell [33]	2005	Dis Col Rectum	Demirbas [43]	2004	Turk J Gastroenterol
Smith J [34]	2006	Am J Surg	Krishnan [44]	2005	Indian J Gastroenterol
Yagik [35]	2007	Int J Col Dis	Van Scheltinga [45]	2006	Scand J Gastroenterol
Van Schaik [36]	2007	Eur J Surg Oncol	Faerden AE [46]	2008	Dis Colon Rectum
Stojadinovic [37]	2007	Ann Surg