1. Biofrontera Bioscience GmbH Leverkusen Germany
2. DermResearch Inc. Austin Texas USA
3. ACM Bioanalytical Services York UK
4. CRS Clinical Research Services Moenchengladbach GmbH Moenchengladbach Germany
5. Nuvisan GmbH Neu‐Ulm Germany
6. CRS Clinical Research Services Mannheim GmbH Mannheim Germany