It looks like the FDA has issued a warning about donor tissue from
Biomedical Tissue Services not meeting FDA standards. Apparently the tissue
received since the beginning of 2004 may contain infectious diseases
including HIV. If you go to
https://www.lawyersandsettlements.com/case/tissue_transplant there is more
information on this as well as what can be done about it. There is a free
case evaluation provided for those who might have had tissue transplants. I
hope that this may be of some help.