*Department of Anesthesiology and Neurosurgery, University of Rome “La Sapienza,” Rome, Italy
†Department of Anesthesiology, Albert Einstein University, Montefiore Medical Center, New York, NY
The study was in part funded with departmental research funds, no corporate sponsor has been involved.
This work was done in the Department of Neurosurgery, University of Rome “La Sapienza,” Rome, Italy.
This paper has been in part presented as abstract at the 2004 PGA, December 9 to 11 New York, NY.
Reprints: Federico Bilotta, MD, PhD, Department of Anesthesiology, Critical Care and Pain Medicine, Viale Somalia 81, Rome 00199, Italy (e-mail: [email protected]).
Received for publication July 20, 2006; accepted January 8, 2007