- NLM Classification (3)
- QT Physiology (7)
- QU Biochemistry (13)
- QZ Pathology (33)
- W Health professions (136)
- WA Public health (82)
- WG Cardiovascular system (117)
- WI Digestive system (24)
- WJ Urogenital system (15)
- WL Nervous system (37)
- WM Psychiatry (3)
- WO Surgery (79)
- WP Gynaecology (21)
- WQ Obstetrics (1)
- WR Dermatology (21)
- WS Pediatrics (27)
- WW Ophthalmology (9)
- WY Nursing (4)
- Y Other (123)
Number of items at this level: 0.