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Subjects
- Nurses15
- Dentistry12
- Hygiene12
- Dental Equipment11
- Health Behavior11
- Tuberculosis, Pulmonary -- prevention & control11
- Schools, Medical8
- Health Education7
- Tooth Extraction7
- Antibodies6
- Disease Transmission, Infectious -- prevention & control6
- Housekeeping6
- USSR6
- World War II6
- American National Red Cross.5
- China5
- Cough5
- Military Personnel5
- Radiography5
- Tuberculosis -- prevention & control5