1. Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA
2. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
3. Department of Pathology, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
4. Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA