BTR means Blood and Tissue Registration System in FDA
Similar to BTR
AABB - American Association of Blood BanksAABP - American Association of Bovine Practitioners
AACR - American Association for Cancer Research
AADA - Abbreviated Antibiotic Drug Application
AAEP - American Association of Equine Practitioners
AAFCO - Association of American Feed Control Officials
AAFP - American Academy of Family Physicians
View all in FDA