Dr. Ferreira is an Assistant Professor of Pediatrics at the George Washington University School of Medicine & Health Sciences. He works as a Clinical and Biochemical Geneticist at Children's National Health System.
Dr. Blau is Senior Consultant in Biochemical Genetics at the Division of Metabolism, University Children's Hospital in Zürich, Switzerland and Professor Emeritus in Clinical Biochemistry at the University of Zurich, Switzerland. He is founder of the BIOPKU Switzerland.