American Academy of Oral and Maxillofacial Pathology American Society for Clinical Pathology California Law California Society of Pathologists California Tumor Tissue Registry Center for Communicable Disease Centers for Medicare and Medicaid Services (CMS) College of American Pathologists Hospital Search at HospitalSoup.com Medi-Cal Medicare Payment Systems Medicare Physician Fee Schedules Morbidity and Mortality Weekly Report NCI Bethesda System 2001 PubMed (National Library of Medicine)