1. Department of Materials Science and Applied Mathematics, Malmö University, SE-20506 Malmö, Sweden
2. Institute of Theoretical Physics and Astronomy, Vilnius University, LT-010222 Vilnius, Lithuania
3. Department of Computer Science, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
4. Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński, 30-348 Kraków, Poland
5. Mathematical Institute, University of Oxford, Andrew Wiles Building, Woodstock Road, Oxford OX2 6GG, UK
6. Division of Mathematical Physics, Department of Physics, Lund University, Box 118, SE-22100 Lund, Sweden
7. Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing, Université libre de Bruxelles, B-1050 Bruxelles, Belgium
8. Theoretical Astrophysics, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
9. No.6 Huayuan Road, Haidian District, Beijing 100088, China
10. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China