1. School of Mechanical Engineering Pusan National University Busan 46241 South Korea
2. Max Planck Institute for Intelligent Systems 70569 Stuttgart Germany
3. Okmetic Oy Vantaa 01510 Finland
4. Institute for Biomedical Engineering ETH Zurich Zurich 8092 Switzerland
5. School of Medicine and College of Engineering Koç University Istanbul 34450 Turkey