{HEAD ~ A method} to determine {TAIL ~ the ability} of a non neurotropic virus to become quiescent and reactivatable in a PC12 cell line, comprising: 
to determine
{ HEAD ~ A method } to determine { TAIL ~ the ability } of a non neurotropic virus to become quiescent and reactivatable in a PC12 cell line , comprising :
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH