- NLM Classification (6)
- QT Physiology (7)
- QU Biochemistry (23)
- QZ Pathology (37)
- W Health professions (13)
- WA Public health (25)
- WG Cardiovascular system (122)
- WI Digestive system (10)
- WJ Urogenital system (22)
- WK Endocrine system (14)
- WL Nervous system (10)
- WM Psychiatry (7)
- WO Surgery (4)
- WP Gynaecology (3)
- WQ Obstetrics (6)
- WR Dermatology (22)
- WS Pediatrics (15)
- WW Ophthalmology (1)
- WY Nursing (4)
- Y Other (125)
Number of items at this level: 0.
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