by Frey, Michael E., MD, DePalma, Michael J., MD, Cifu, David X., MD, Bhagia, Sarjoo M., MD, Carne, William, PhD, Daitch, Jonathan S., MD
Published in The spine journal (01.03.2008)

by Frey, Michael E., MD, Dery, Fred J., MD, Cifu, David X., MD
Published in PM & R (01.04.2009)

by Frey, Michael E., MD, DePalma, Michael J., MD, Cifu, David X., MD, Carne, William F., PhD
Published in Archives of physical medicine and rehabilitation (2007)

by DePalma, Michael J., MD, Beall, Douglas P., MD, Frey, Michael E., MD, Kallmes, David F., MD, Prather, Heidi, DO
Published in PM & R (01.09.2010)