The Rothman Orthopedic Specialty Hospital in Bensalem, Pa. hosted the second annual Operation Walk USA on December 7. Operation Walk provides free hip and knee replacements to the uninsured and underinsured who are in critical need. Dr. Hozack's patient, Sandra Fanelli, and her identical twin sister Deborah both received hip replacements through the program. (Captions by Gillian Francella/Philly.com and Photos by Colin Kerrigan/Philly.com) Warning: this gallery contains images some viewers may find disturbing.
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