1. Michigan State University College of Human Medicine, Grand Rapids, MI, USA (AFL);
2. University of the Incarnate World School of Osteopathic Medicine, San Antonio, TX, USA (AG);
3. Rocky Vista University College of Osteopathic Medicine, Ivins, UT, USA (AKC);
4. Eastern Virginia Medical School, Norfolk, VA, USA (SM);
5. Arizona State University, Tempe, AZ, USA (TV)