- NLM Classification (1)
- QT Physiology (1)
- QU Biochemistry (12)
- QZ Pathology (29)
- W Health professions (13)
- WA Public health (95)
- WG Cardiovascular system (114)
- WI Digestive system (16)
- WJ Urogenital system (37)
- WM Psychiatry (3)
- WO Surgery (4)
- WP Gynaecology (60)
- WQ Obstetrics (23)
- WR Dermatology (20)
- WS Pediatrics (18)
- WW Ophthalmology (1)
- WY Nursing (4)
- Y Other (122)
Number of items at this level: 0.