Similar to OP 3 (OC)

AAPHP - American Association of Public Health Physicians
AAPM - American Association of Physicists in Medicine
AAR - After Action Review
AARP - American Association of Retired Persons
AAS - Acute Abdominal Series
AASRP - American Association of Small Ruminant Practitioners
AATB - American Association of Tissue Banks

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