1. Jena University Hospital; Friedrich Schiller University, Institute of Human Genetics; Jena Germany
2. Pallister-Killian Syndrome Foundation of Australia; Myaree Australia
3. Chromosome 22 Central; Timmins Canada
4. Chromosome 22 Central; Fuquay-Varina North Carolina
5. FDNA Inc.; Boston Massachusetts
6. Center for Ambulant Medicine; Human Genetics; Jena Germany