The lymph nodes draining the small intestine and colon are anatomically separate and immunologically distinct (bibtex)
by Houston, S A, Cerovic, V, Thomson, C, Brewer, J, Mowat, A M and Milling, S
Reference:
S. A. Houston, V. Cerovic, C. Thomson, J. Brewer, A. M. Mowat, S. Milling, "The lymph nodes draining the small intestine and colon are anatomically separate and immunologically distinct", Mucosal Immunol., vol. 9, no. 2, pp. 468–478.
Bibtex Entry:
@Article{Houston2015,
  Author          = {Houston, S A and Cerovic, V and Thomson, C and Brewer, J
                    and Mowat, A M and Milling, S},
  Title           = {The lymph nodes draining the small intestine and colon
                    are anatomically separate and immunologically distinct},
  JournalTitle    = {Mucosal Immunol.},
  Date            = {2015},
  DOI             = {10.1038/mi.2015.77},
  Keywords        = {Cerovic-Selection},
  Number          = {2},
  Pages           = {468--478},
  Volume          = {9}
}