Joël Vos1, Encarna Gómez-García, Jan C. Oosterwijk, Fred H. Menko, Reinoud D. Stoel, Christi J. van Asperen1, Anna M. Jansen1, Anne M. Stiggelbout, Aad Tibben. 1 Department of Clinical Genetics, Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands. 2 Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, The Netherlands. 3...