Causality is an issue here always. The malignant disease is clearly caused by a specific mutation that occurs that is not seen in other forms of ALCL. The causality of breast implant illness by breast implants is still debated. I recently put up research where we showed with current Bradford Hill criteria—which are the criteria that we use to support causality—that breast implant illness is, indeed, caused by the breast implants.
Let's go back to the discussion about smoking. In the late 19th century, it was already clear that some patients who smoked did get lung cancer. However, it lasted until 1960 when causality was proven, and that was Dr. Bradford Hill who did that. It is very difficult to fight against the manufacturers.