Its true shareholders are unknown, and Carlos Pascual, then U.S. ambassador to Ukraine, remarked at a conference in Kiev that he feared it was connected to organized crime.
"However, the true cost of adverse incidents remains unknown because the treatment costs of remedying the harm caused to patients or clients are not routinely measured, " the office added.
But the true extent of the problem is largely unknown because there are no official figures on waiting lists for sperm and egg donation around the country or data on the number of British patients travelling abroad for treatment.
The Bank of Italy said last week that it only became aware of the "true nature" of the derivatives contracts when Monte dei Paschi's new management found a previously unknown document relating to the contracts in a safe last October.