1. Ankara Atatürk Education and Research Hospital, Department of ENT, Ankara, Turkey
2. Ankara Occupational Diseases Hospital, Department of ENT, Ankara, Turkey
3. Başkent University, Department of Dermatology, Ankara, Turkey
4. Ankara Occupational Diseases Hospital, Department of Dermatology, Ankara, Turkey
5. Düzce University, Department of ENT, Düzce, Turkey
6. Bozok University, Department of Toxicology, Yozgat, Turkey
7. Ankara Occupational Diseases Hospital, Department of Toxicology, Ankara, Turkey