1. Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, South Korea
2. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, South Korea
3. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul 03722, South Korea
4. Department of Materials Science and Engineering, Inha University, Incheon 22212, South Korea
5. Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea