1. Department of Medical System EngineeringGwangju Institute of Science and Technology (GIST)Gwangju500‐712Republic of Korea
2. Microwave Group, Soild State ElectronicsDepartment of Engineering SciencesAngstrom LaboratoryUppsala UniversityUppsalaSweden
3. Traumatology, SurgeryUMC UtrechtHeidelberglaan, 1003584CX UterchtThe Netherlands