Home > People > Investigators A. Arturo Leis, M.D. Senior Scientist (601) 364-3423 aleis@mmrcrehab.org Dobrivoje S. Stokic, M.D., D.Sc. Senior Scientist (601) 364-3314 dstokic@mmrcrehab.org Keith E. Tansey, MD, PhD, FASNR, FASIA Senior Scientist 601-364-3517 ktansey@mmrcrehab.org John W. Chow, Ph.D. Scientist (601) 364-3402 jchow@mmrcrehab.org Matthias Krenn, Ph.D. Affiliate Scientist (601) 364-3413 mkrenn@mmrcrehab.org Clea C. Evans, Ph.D. Clinical Collaborator (601) 364-3411 cevans@mmrcrehab.org Chris Wallace, CPO, FAAOP Clinical Collaborator (601) 936-8899 cwallace@mmrcrehab.org