When Dick and Mimi Murphy started volunteering at MD Anderson in 2011, they had no idea how much giving back would impact the patients they served. They certainly didn’t know how much it would impact their own lives. 

With more than 5,000 volunteer hours between them, the Murphys look forward to their weekly drive to MD Anderson’s Texas Medical Center Campus from their home in Sugar Land, about 20 miles southwest of Houston. Before...