Measurement of GABAA receptor binding in vivo with [11C]Flumazenil: A test-retest study in healthy subjects. - Elina Salmi; Sargo Aalto; Jussi Hirvonen; Jaakko W. Långsjö; Anu T. Maksimow; Vesa Oikonen; Liisa Metsähonkala; Jussi Virkkala; Kjell Någren; Harry Scheinin (NeuroImage, 2008)