sentences:  The training of a physician anesthesiologist typically consists of 4 years of college, 4 years of medical school, 1 year of internship, and 3 years of residency optionally followed by a one-year fellowship in a sub-specialty.It is the highest training level for all practitioners delivering anesthesia in the United States.While most physicians practicing anesthesiology in the United States
  pass a comprehensive board exam, board certification is not required in order to practice anesthesiology.