1. Wells KB, Golding J, Burnan MA: Psychiatric disorder in a sample of the general population with and without chronic medical conditions. Am J Psychiatry. 1998, 145: 976-979.
2. Regier DA, Goldberg ID, Tance CH: The de facto U.S. mental health systems. Arch Gen Psychiatry. 1978, 35: 685-693.
3. Cassen EH: Depression and anxiety secondary to medical illness. Psychiatr Clin North Am. 1990, 13: 597-612.
4. Cassem NH, Bernstein JG: Depressed patients. Massachusetts General Hospital Handbook of General Hospital Psychiatry. Edited by: Stern TA, Fricchione GL, Cassen WH, Jellinek MS, Rosenbanm JF. 2004, Philadelphia, PA: Mosby/Elsevier, 25-68. 5
5. Lykouras E, Ioannidis H, Voulgaris A: Depression in general hospital patients: preliminary results. Arch Hell Med. 1987, 4: 287-289.