1. Laser Spectroscopy and Sensing Lab Institute for Quantum Electronics ETH Zurich Zurich 8093 Switzerland
2. Section of Periodontology and Dental Prevention Division of Oral Diseases Department of Dental Medicine Karolinska Institutet Huddinge 14152 Stockholm Sweden
3. Department of Periodontology School of Dentistry Adnan Menderes University Aydin 09100 Turkey
4. Department of Periodontology Faculty of Dentistry Egg University Izmir 35100 Turkey