Saturday, October 11, 2008 - 6:46AM EST

United States

Maryland

Name of AuthorInstitutional Affiliation
Cohen SPPain Management Division, Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, USA. scohen40@jhmi.edu
Mao JPain Management Division, Department of Anesthesiology & Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, USA.