McKinsey L. Goodenberger, MS, CGC, is a Genetic Counselor in the Department of Laboratory Medicine and Pathology at the Mayo Clinic in Rochester, MN. Brittany C. Thomas, MS, CGC, is a Genetic Counselor Supervisor in the Department of Laboratory Medicine and Pathology at the Mayo Clinic in Rochester, MN. Teresa Kruisselbrink, MS, CGC, is a Genetic Counselor Supervisor at the Mayo Clinic's Center for Individualized Medicine in Rochester, MN. Together the editors have more than 40 years' experience in genetic counseling.