GABAA receptor abnormalities in Prader-Willi syndrome assessed with positron emission tomography and [11C]flumazenil. - Giovanni Lucignani; Andrea Panzacchi; Laura Bosio; Rosa Maria Moresco; Laura Ravasi; Isabella Coppa; Giuseppe Chiumello; Kirk Frey; Robert A. Koeppe; Ferruccio Fazio (NeuroImage, 2004)