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Subject
- Public health21,283
- Medical care17,199
- Health and hygiene13,341
- Law and legislation10,323
- Medicine9,510
- Prevention9,358
- History9,333
- Health9,329
- Health aspects8,466
- Research8,080
- Diseases7,285
- Mental health6,148
- Women5,702
- Health insurance5,567
- Treatment5,071
- Older people5,011
- Government policy4,979
- United States4,667
- Children4,561
- Medicare4,529