Alexithymia and anhedonia in early Richardson's syndrome and progressive supranuclear palsy with predominant parkinsonism oleh Francesca Assogna, Clelia Pellicano, Luca Cravello, Cinzia Savini, Lucia Macchiusi, Mariangela Pierantozzi, Alessandro Stefani, Bruno Mercuri, Carlo Caltagirone, Francesco E. Pontieri, Gianfranco Spalletta