Subjects
- World War I504
- Philadelphia499
- Humans481
- National Library of Medicine (U.S.)468
- Pharmaceutical Preparations460
- Massachusetts449
- Physiological Phenomena440
- New York City434
- Therapeutics424
- United States. Department of Health and Human Services.414
- Anniversaries and Special Events409
- Education, Medical409
- Nonprescription Drugs398
- France396
- Cholera394
- Surgical Procedures, Operative374
- Mexico371
- Equipment and Supplies357
- Disease Outbreaks339
- Patients333