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- World War I20
- United States15
- France7
- Military Personnel7
- Hospitals, Military5
- Military Medicine5
- Sexual Behavior4
- United Kingdom4
- Chemistry3
- Contraception3
- Diabetes Mellitus3
- Disabled Persons -- rehabilitation3
- Heart Diseases3
- Hygiene3
- Immune Sera3
- Military Hygiene3
- Military Nursing3
- Neoplasms3
- Ambulances2
- American National Red Cross.2