Dr Dennis William Coombs MDDennis W. Coombs , MD is currently President of Coombs Pain Management Institute, Lebanon, NH. Dr. Coombs was formerly Professor and First Garth professor of Anesthesiology (Emeritus) at Dartmouth Medical School & Dartmouth-Hitchcock Medical Center, Hanover, NH and Professor and Chairperson, Dept. of Anesthesiology & Pain Management, University of Nebraska, Omaha, NE. Dr. Coombs has already made three trips to Zambia and Tanzania since 2001 as a medical volunteer.