title: Author response.
authors.forename: William D
authors.initials: WD
authors.lastname: Freeman
authors.forename: Kenneth A
authors.initials: KA
authors.lastname: Vatz
authors.forename: Robert C
authors.initials: RC
authors.lastname: Griggs
authors.forename: Timothy
authors.initials: T
authors.lastname: Pedley
mesh_terms: D003198:Computer Simulation / Q000639:trends*; D005260:Female; D006301:Health Services Needs and Demand / Q000639:trends*; D006280:Health Workforce / Q000639:trends*; D006801:Humans; D008297:Male; D009462:Neurology / Q000639:trends*; D010820:Physicians / Q000639:trends*; D012179:Retirement / Q000639:trends*