1. Department of Periodontology; Centre for Dental, Oral, and Maxillofacial Medicine (Carolinum); Johann Wolfgang Goethe-University Frankfurt/Main; Frankfurt Germany
2. Department of Laboratory Medicine; Centre for Internal Medicine; Hospital of the Johann Wolfgang Goethe-University Frankfurt/Main; Frankfurt Germany
3. Pneumology, Allergology and Cystic Fibrosis, Children's Hospital; Hospital of the Johann Wolfgang Goethe-University Frankfurt/Main; Frankfurt Germany