Pérez San Gregorio, M. A., A. Martín Rodríguez, E. Asián Chaves, and J. Pérez Bernal. 2004. “Symptoms of Anxiety and Depression in Liver-Transplant Patients”. Actas Españolas De Psiquiatría 32 (4):222-26. https://actaspsiquiatria.es/index.php/actas/article/view/1276.