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