[1] La Maddalena Canc Ctr, Anesthesia & Intens Care Unit, I-90146 Palermo, Italy
[2] La Maddalena Canc Ctr, Pain Relief & Palliat Care Unit, I-90146 Palermo, Italy
[3] Soc Assistenza Malato Oncol Terminale, Home Palliat Care Program, Palermo, Italy
[4] Beth Israel Med Ctr, Dept Pain Med & Palliat Care, New York, NY 10003 USA