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