1. Department of Civil Engineering, School of Engineering, Aalto University, Espoo, Finland
2. College of Construction Engineering, Jilin University, Changchun, P.R. China
3. Key Laboratory of Drilling Technology in Complex Conditions of Ministry of Land and Resources of the People’s Republic of China, Changchun, P.R. China
4. Finnish Institute of Occupational Health, Helsinki, Finland
5. Xardu Oy, Oulu, Finland