Elias Zerhouni, the former National Institutes of Health director who now heads up R&D at Sanofi-Aventis, has found that translational medicine is more difficult than he'd expected, reports the Wall Street Journal's Health Blog. Zerhouni, the Health Blog notes, pushed for better translational medicine. Upon joining Sanofi, "I thought the solution would be simple," Zerhouni said at a press event.