I can answer this one in place of xrymd because there is no commercial test to do this.
Right, but it is possible if someone was really interested in knowing. I guess the point I was trying to make is that most docs have been able to ignore the problems because the problems mostly show up only in the second use situation.
One can rationalize this away by saying they simply won't use the bovine product on anyone with a prior surgery, but that just postpones the problem to the next person with a scalpel.
Even first time use can create antibodies to human factors (30% of patients).
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