1. Department of Clinical Genetics; Medical University of Białystok; Białystok Poland
2. Department of Human Genetics; KU Leuven and University Hospitals Leuven; Leuven Belgium
3. Department of Radiology; Medical University; Białystok Białystok Poland
4. Department of Medical Genetics; Institute of Mother and Child; Warsaw Poland
5. Laboratory of Cytogenetics; Regional Children Hospital; Bydgoszcz Bydgoszcz Poland
6. Department of Molecular & Human Genetics; Baylor College of Medicine; Houston Texas