Investigative Techniques Health & Biological Sciences 38 Diagnostic Techniques and Procedures 34 Health Care 30 Health Care Quality, Access, and Evaluation 28 Quality of Health Care 27 Health Care Evaluation Mechanisms 26 Medicine 26 Epidemiologic Methods 24 Diseases 23 Public Health 23 Environment and Public Health 22 Methods 18 Statistics as Topic 15 Health Occupations 14 Clinical Medicine 12 Evidence-Based Medicine 12 Evidence-Based Practice 12 Health Services Administration 12 Diagnosis 11 Natural Science Disciplines 11 Probability 11 Risk 11 Organization and Administration 10 Evaluation Studies as Topic 9 Therapeutics 9 Epidemiologic Measurements 8 Behavior and Behavior Mechanisms 7 Health Care Economics and Organizations 7 Information Science 7