[11C]FMAU and [18F]FHPG as PET tracers for herpes simplex virus thymidine kinase enzyme activity and human cytomegalovirus infections. - de Vries,E.F.; van Waarde,A.; Harmsen,M.C.; Mulder,N.H.; Vaalburg,W.; Hospers,G.A. (Nucl Med Biol, 2000)