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Top Bar Links Main navigation Top Bar Links Main navigation Saving and Improving Lives by promoting the safety quality and availability of donated human tissue The American Association of Tissue Banks The American Association of Tissue Banks AATB is a professional nonprofit scientific and educational organization. AATB is the premier standard setting body promoting the safety and use of donated human tissue. The overwhelming majority of the human tissue distributed for transplant comes from AATBaccredited tissue banks. More about us Becoming an AATB Member Institutional Accreditation The only accreditation program for tissue establishments recognizing the highest commitment to the quality and safety of donated human tissue.