sentence: Surgical training requires a minimum of five years of residency after medical school.
sentences_after: Sub-specialties of surgery often require seven or more years. In addition, fellowships can last an additional one to three years. Because post-residency fellowships can be competitive, many trainees devote two additional years to research. Thus in some cases surgical training will not finish until more than a decade after medical school. Furthermore, surgical training can be very difficult and time-consuming.
concept_name: surgical training
headings: Medical specialty