title: Minimally invasive or conventional valve surgery: operations prevailing in 2020--the middle ground.
authors.forename: W R
authors.initials: WR
authors.lastname: Chitwood
mesh_terms: D006348:Cardiac Surgical Procedures / Q000639:trends; D002309:Cardiology / Q000639:trends; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D019060:Minimally Invasive Surgical Procedures / Q000639:trends