title: Cardiology manpower. Ninth Bethesda Conference. Introduction and charge to the Conference.
mesh_terms: D006328:Cardiac Catheterization; D006348:Cardiac Surgical Procedures; D002309:Cardiology / Q000266:history; D002318:Cardiovascular Diseases / Q000517:prevention & control; D005544:Forecasting; D049673:History, 20th Century; D000078329:Workforce