1. Department of Electrical Engineering and Informatics, Vocational College, Universitas Gadjah Mada, Yogyakarta, Indonesia
2. Department of Plastic, Reconstructive, and Esthetic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
3. Department of Mechanical Engineering, Division of Fundamental Engineering, Graduate School of Science and Engineering, Chiba University, Chiba, Japan