a) providing nucleic acid from a subject, wherein said {HEAD ~ nucleic acid} comprises {TAIL ~ a Nod2 gene}; and 
comprises
a ) providing nucleic acid from a subject , wherein said { HEAD ~ nucleic acid } comprises { TAIL ~ a Nod2 gene } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH