1. Department of Pathology, College of Medicine, Hallym University, Anyang, Korea
2. Department of Oral Pathology, Faculty of Dentistry, University of Buenos Aires, Buenos Aires, Argentina
3. Division of Radiation Pathology, Department of Radiobiology, National Atomic Energy Commission, Buenos Aires, Argentina
4. Department of Pathology, College of Medicine, Kyung Hee University, Seoul, Korea