Changes in proficiency test monitoring and follow up for laboratories.
D000068:Accreditation; D004650:Employee Performance Appraisal / Q000592:standards*; D007591:Joint Commission on Accreditation of Healthcare Organizations; D007755:Laboratories, Hospital; D013677:Medical Laboratory Science / Q000592:standards*; D011361:Professional Competence; D014481:United States; D000078329:Workforce