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hematology × 292human-biology × 60
red-blood-cell × 43
blood-circulation × 30
physiology × 29
immunology × 22
cell-biology × 19
pathology × 14
cardiology × 14
medicine × 14
blood-group × 14
biochemistry × 13
zoology × 13
human-physiology × 10
circulatory-system × 10
genetics × 9
cancer × 7
antibody × 7
evolution × 6
molecular-biology × 6
terminology × 6
stem-cells × 6
dna × 5
homework × 5
human-anatomy × 5
