title: Discussion.
mesh_terms: D002568:Certification; D004503:Education, Medical, Graduate / Q000379:methods*; D006801:Humans; D007396:Internship and Residency; D010820:Physicians / Q000600:supply & distribution*; D013903:Thoracic Surgery / Q000193:education*; D019616:Thoracic Surgical Procedures / Q000193:education*