First of all, we need to get away from the term “false positive”. It's completely a misnomer. A false positive implies that someone has said somebody has cancer when they don't. What the term really refers to, as I think Dr. Kulkarni mentioned earlier, is when women are asked to come back for additional imaging to make sure there's no cancer. The first screening exam is not absolutely clearly negative, and they want to make sure they don't miss a cancer.
If it takes a while before the answer to that additional imaging comes out, there will be some anxiety, but much of the research shows that the anxiety is transient. As Dr. Seely mentioned, patients are generally much happier to accept that anxiety as opposed to the chance of a missed diagnosis of cancer and the need to treat advanced disease. The task force is really off base in considering that as a harm. We should try to reduce anxiety, not reduce the detection of cancer.