1. College of American Pathologists (CAP). Definition of quality assurance, quality control, and quality improvement. Northfield, IL: CAP; 2014.
2. Working group of Histopathology QA Guidelines, Faculty of Pathology. Guidelines for implementation of a national quality assurance program in histopathology, version 5.0. Dublin: Royal College of Physicians of Ireland; 2009.
3. Recommendations for Quality Assurance and Improvement in Surgical and Autopsy Pathology