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