1. Department of Materials Science and Engineering; Korea Advanced Institute of Science and Technology (KAIST); 291 Daehak-ro Yuseong-gu, Daejeon 305-701 Republic of Korea
2. Division of Cardiology, Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; 50 Yonsei-ro Seodaemun-gu, Seoul 120-752 Republic of Korea
3. iBULe Photonics Co., Ltd.; 145 Gaetbeol-ro Yeonsu-gu, Incheon 406-840 Republic of Korea