Subjects
- Alopecia Areata -- epidemiology1
- Amenorrhea -- drug therapy1
- American Native Continental Ancestry Group1
- American Revolution3
- Amnion1
- Amputation1
- Anal Canal -- surgery1
- Anastomosis, Surgical1
- Anatomy3
- Anemia, Hypochromic -- etiology1
- Anemia, Pernicious -- complications1
- Anemia, Pernicious -- etiology1
- Anesthesia1
- Anesthetics -- administration & dosage1
- Animal Experimentation1
- Animals1
- Anniversaries and Special Events4
- Anthropology -- organization & administration1
- Anthropology, Physical1
- Anthropometry1