Crandell, D.R., 1971, Postglacial lahars from Mount Rainier volcano, Washington: U.S. Geological Survey Professional Paper 677, p. 1-75.
Training Requirements. To qualify a gastroenterologist, you will have to first complete a 4 year medical school program and receive either an M.D. or a D.O. You will then need to complete a 2 to 3 year residency program, typically in internal medicine.o qualify a gastroenterologist, you will have to first complete a 4 year medical school program and receive either an M.D. or a D.O. You will then need to complete a 2 to 3 year residency program, typically in internal medicine.
3. Gastroenterologist. Average Salary: $370,000. Gastroenterology is among the highest paid medical specialties. A gastroenterologist diagnoses and treats illnesses that affect the digestive system, as well as recommending prevention measures. Gastroenterologists analyze the movement of food in the digestive system and its nutritional use.