1. Institute for Technology Assessment and Systems Analysis, Karlsruhe Institute of Technology, Berlin, Germany; Chinese Academy of Science and Technology for Development, Beijing, China
2. Institute for Technology Assessment and Systems Analysis, Karlsruhe Institute of Technology, Berlin, Germany
3. Chinese Academy of Science and Technology for Development, Beijing, China
4. Institute for Technology Assessment and Systems Analysis, Karlsruhe Institute of Technology, Karlsruhe and Berlin, Germany