1 Medical Innovators Development Program, Vanderbilt University School of Medicine, Nashville, Tennessee. Electronic address: john.n.grimes@vanderbilt.edu.
2 Medical Innovators Development Program, Vanderbilt University School of Medicine, Nashville, Tennessee.
3 AMITA Resurrection Medical Center, Chicago, Illinois.
4 Chair, Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.