b) detecting {HEAD ~ the presence} or absence of {TAIL ~ a variant Nod2 gene}, wherein said variant Nod2 gene has a nucleic acid sequence having a cytosine insertion at position 3124 of SEQ ID NO:1, wherein the presence of a cytosine insertion at position 3124 of SEQ ID NO:1 is indicative of said subject having an increased risk of developing Crohns disease 
of
b ) detecting { HEAD ~ the presence } or absence of { TAIL ~ a variant Nod2 gene } , wherein said variant Nod2 gene has a nucleic acid sequence having a cytosine insertion at position 3124 of SEQ ID NO:1 , wherein the presence of a cytosine insertion at position 3124 of SEQ ID NO:1 is indicative of said subject having an increased risk of developing Crohns disease
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH