1. Formerly Department of Civil and Environmental Engineering, Imperial College London, London, UK; now Department of Construction Engineering and Lighting Science, School of Engineering, Jönköping University, Jönköping, Sweden
2. Department of Civil Engineering, University of Bristol, Bristol, UK; formerly Department of Civil and Environmental Engineering, Imperial College London, London, UK
3. Department of Civil and Environmental Engineering, Imperial College London, London, UK
4. Department of Engineering Science, University of Oxford, Oxford, UK