{HEAD ~ The invention} also provides compositions and {TAIL ~ methods} for determining the presence of E. canis antigens and antibodies 
provides
{ HEAD ~ The invention } also provides compositions and { TAIL ~ methods } for determining the presence of E. canis antigens and antibodies
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH