I talked this over with McGill University medical ethicist Jonathan Kimmelman, who specializes in the risks of medical experiments and has written a book about them centered on the Jesse Gelsinger case. Of course, he says, money isn’t the only thing that might prevent medical researchers from being perfectly objective -- there’s the desire to be heroes, to beat rivals, and to help patients. A bigger concern is the fact that whatever is driving scientists, they can have blind spots just like everyone else.