title: Knock, knock. Who's not there?
authors.affiliation: president@tma.medwire.org
authors.forename: Robert D
authors.initials: RD
authors.lastname: Kirkpatrick
mesh_terms: D006280:Health Workforce; D006801:Humans; D008507:Medically Underserved Area; D010820:Physicians / Q000600:supply & distribution*; D013038:Specialization; D013714:Tennessee; D014850:Waiting Lists