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Doctor of physical therapy Doctor of physical therapy Adam Rufa Adam Rufa tells tells how to deal with common sources of back pain how to deal with common sources of back pain. Fertility expert. Fertility expert Kazim Chohan, PhD, Kazim Chohan, PhD, and pediatric cancer specialist and pediatric cancer specialist Jody Sima, MD Jody Sima, MD, describe a new program that allows males facing cancer or other conditions, describe a new program that allows males facing cancer or other conditions to preserve their ability to father children to preserve their ability to father children. Orthopedic surgeon. Orthopedic surgeon Brian Kistler, MD Brian Kistler, MD, explains, explains how broken bones are repaired after traumatic injury. how broken bones are repaired after traumatic injury.