Similar to NA

A/L - Annual Leave
A2LA - American Association for Laboratory Accreditation
AAA - Abdominal Aortic Aneurysm
AAALAC - Association for Assessment and Accreditation of Laboratory Animal Care International
AAAP - American Association of Avian Pathologists
AABB - American Association of Blood Banks
AABP - American Association of Bovine Practitioners

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