For Julie E. Greenberg SM ’89, PhD ’94, what began with a middle-of-the-night phone call from overseas became a gratifying career of study, research, mentoring, advocacy, and guiding of the office of a unique program with a mission to educate the next generation of clinician-scientists and engineers. In 1987, Greenberg was a computer engineering graduate of the University of Michigan, living in Tel Aviv, Israel, where she was working for Motorola — when she answered an early-morning call from Roger Mark, then the director of the Harvard-MIT Program in Health…