American Orthopedics of Columbus, Ohio, announced the addition of three residents to its professional staff. Evan Zillich started his prosthetic residency in July 2007. He earned a master's degree in orthotics and prosthetics from Eastern Michigan University, Ypsilanti, and received a bachelor's degree in engineering arts from Michigan State University, East Lansing. He completed his orthotic residency earlier in 2007. Michael Hansen started his prosthetic residency in August 2007. He earned a master's degree in orthotics and prosthetics from the Georgia Institute of Technology, Atlanta, and received a bachelor's degree in mechanical engineering from the University of Cincinnati, Ohio. He also completed his orthotic residency earlier in 2007. Jennifer Anderson started her orthotic residency in October 2007. She participated in the inaugural blended learning certificate program at the Northwestern University Prosthetics-Orthotics Center, Chicago, Illinois. She received a bachelor's degree in electrical engineering and a master's degree in biomedical engineering from the Ohio State University, Columbus.