Secreted proprotein convertase subtilisin/kexin type 9 reduces both hepatic and extrahepatic low-density lipoprotein receptors in vivo. - Schmidt RJ; Beyer TP; Bensch WR; Qian YW; Lin A; Kowala M; Alborn WE; Konrad RJ; Cao G (Biochemical and biophysical research communications, 2008)