- NLM Classification (13)
- QT Physiology (7)
- QU Biochemistry (13)
- QZ Pathology (386)
- W Health professions (84)
- WA Public health (3)
- WB Practice of medicine (465)
- WG Cardiovascular system (118)
- WI Digestive system (27)
- WJ Urogenital system (21)
- WL Nervous system (37)
- WM Psychiatry (1)
- WO Surgery (20)
- WP Gynaecology (63)
- WQ Obstetrics (24)
- WR Dermatology (21)
- WS Pediatrics (13)
- WW Ophthalmology (2)
- WY Nursing (4)
- Y Other (123)
Number of items at this level: 0.