1. German Contact Allergy Group (DKG)
2. Information Network of Departments of Dermatology (IVDK)
3. Work Group Occupational and Environmental Dermatology (ABD)
4. German Society of Allergology and Clinical Immunology (DGAKI)
5. Professional Association of German Dermatologists (BVDD)
6. German Society of Dermatology (DDG)
7. Professional Association of German Allergists (AeDA)