title: Studies and more studies.
authors.forename: M D
authors.initials: MD
authors.lastname: Mattera
mesh_terms: D006801:Humans; D015969:National Academies of Science, Engineering, and Medicine, U.S., Health and Medicine Division; D009740:Nursing Staff / Q000600:supply & distribution*; D011787:Quality of Health Care; D012107:Research Design; D014481:United States