- NLM Classification (1091)
- QT Physiology (20)
- QU Biochemistry (34)
- QZ Pathology (293)
- W Health professions (247)
- WA Public health (171)
- WB Practice of medicine (460)
- WG Cardiovascular system (107)
- WI Digestive system (93)
- WJ Urogenital system (60)
- WK Endocrine system (25)
- WL Nervous system (41)
- WM Psychiatry (32)
- WO Surgery (150)
- WP Gynaecology (87)
- WQ Obstetrics (21)
- WR Dermatology (15)
- WS Pediatrics (41)
- WV Otolaryngology (13)
- WW Ophthalmology (17)
- WY Nursing (2)
- Y Other (120)
Number of items at this level: 0.