1. Hannover Medical School; Hannover Germany
2. University Hospital Zurich; Zurich Switzerland
3. Universitätsklinikum Gießen and Marburg; Gießen Germany
4. Ege University Children's Hospital; Izmir Turkey
5. Carver College of Medicine; The University of Iowa; Iowa City IA USA
6. Nagoya University Hospital; Nagoya Aichi Japan
7. St Thomas' Hospital; London UK
8. Novo Nordisk A/S; Søborg Denmark