Attenuating mutations in the P/C gene of human parainfluenza virus type 1 (HPIV1) vaccine candidates abrogate the inhibition of both induction and signaling of type I interferon (IFN) by wild-type HPIV1 - Van Cleve,W.; Amaro-Carambot,E.; Surman,S.R. (Virology, 2006)