Development of a New Reporter Gene System-dsRed/Xanthine Phosphoribosyltransferase-Xanthine for Molecular Imaging of Processes Behind the Intact Blood-Brain Barrier oleh Mikhail Doubrovin, Vladimir Ponomarev, Inna Serganova, Suren Soghomonian, Tadashi Myagawa, Tatiana Beresten, Lyudmila Ageyeva, Michel Sadelain, Jason Koutcher, Ronald G Blasberg, Juri G. Gelovani Tjuvajev