Peripheral nerve blocks of the hand.

Jr., MD (Director); Sunday Clark, MPH, ScD; Lisa A. Dubois; Olivier W. Hugli, MD; Andrea J. Pelletier, MS, MPH; and Ashley F. Sullivan, MS, MPH (all at Massachusetts General Hospital, Boston, MA). The principal investigators at the 29 participating sites were as follows: F. C. Baker III (Maine Medical Center, Portland, ME); M. P. Blanda (Summa Health System, Akron, OH); E. D. Boudreaux (Earl K. Long Memorial Hospital, Baton Rouge, LA); B. E. Brenner (The Brooklyn Hospital Center, Brooklyn, NY); C. A. Camargo Jr. (Massachusetts General Hospital, Boston, MA); R. K. Cydulka (MetroHealth Medical Center, Cleveland, OH); T. J. Gaeta (New York Methodist Hospital, Brooklyn, NY); B. Goldfeder (Shands Hospital at the University of Florida, Gainesville, FL); R. J. Grant (Hartford Hospital, Hartford, CT); R. O. Gray (Hennepin County Medical Center, Minneapolis, MN); A. Guttman (Sir Mortimer B. Davis–Jewish General Hospital, Montreal, QC, Canada); L. W. Kreplick (Christ Hospital & Medical Center, OakLawn, IL); D. S. Mackey (Lethbridge Regional Hospital, Lethbridge, AB, Canada); A. Mangione (Albert Einstein Medical Center, Philadelphia, PA); J. Peters (University of Texas HealthSciences Centerat SanAntonio, SanAntonio, TX); M. S. Radeos (Lincoln Medical Center, Bronx, NY); P. L. Rice (Brigham and Women’s Hospital, Boston, MA); B. H. Rowe (University of Alberta Hospital, Edmonton, AB); M. Sama (St. Joseph Mercy Hospital, Ann Arbor, MI); D. Schreiber (Stanford University Medical Center, Stanford, CA); N. I. Shapiro (Beth Israel Deaconess Medical Center, Boston, MA); P. C. Shukla (University of Texas Southwestern Medical Center, Dallas, TX); D. Sinclair (Queen Elizabeth II Health Science Centre, Halifax, NS); H. Smithline (Baystate Medical Center, Springfield, MA); P. E. Sokolove (UC Davis Medical Center, Sacramento, CA); M. Steffens (Palmetto Richland Memorial Hospital, Columbia, SC); C. A. Terregino (Cooper Hospital/University Medical Center, Camden, NJ); A. Travers (Royal Alexandria Hospital, Edmonton, AB, Canada); and E. J. Weber (UCSF Medical Center, San Francisco, CA). 14 Tsai et al. HOSPITAL ADMISSION FOR COPD EXACERBATION