автор: Nancy P. Callanan

Bonnie S. Le Roy, MS, CGC, Professor, Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA. Patricia Mc Carthy Veach, Ph D, LP, Professor Emerita, Department of Educational Psychology, University of Minnesota, Minneapolis, MN, USA. Nancy P. Callanan, MS, CGC, Director Emeritus, MS Genetic Counseling Program, University of North Carolina at Greensboro, NC, USA.