1. Department of Clinical GeneticsMedical University of Bialystok Bialystok Poland
2. Department of Maxillo‐Facial SurgeryMedical University of Bialystok Bialystok Poland
3. Paediatric Otolaryngology of Clinic, Medical University of Bialystok Bialystok Poland
4. Department of Prosthetic DentistryMedical University of Bialystok Bialystok Poland
5. Institute of Human Genetics, University Hospital Magdeburg Magdeburg Germany