Todd Brady, and Andrea Darling explain why they choose to give back, and shared what they hope to accomplish through their philanthropy.

In appreciation of the gifts of knowledge and training, the George W. McLean estate has funded an endowment to support endocrinology research.

When Elizabeth Harden entered Duke School of Medicine in 1974, only 22 percent of medical school students in the U.S. were women. Harden found no such attitudes at Duke.

Georgeanna J. Klingensmith's generous bequest funds a professorship in pediatrics at Duke University School of Medicine.