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- Kiepenheuer-Institut für Sonnenphysik, Freiburg, Germany
- Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
- Department for Applied Mathematics, University of Sheffield, Sheffield, Great Britain
- Centro de Astrofisica da Universidade do Porto, Porto, Portugal
- Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany
- Instituto Nazionale Di Astrofisica, Rome, Italy
- Instituut voor Sterrekunde, Leuven, Belgium
- Instytut Astronomiczny, Uniwersytet Wrocławski, Wrocław, Poland
- Observatoire de la Côte d'Azur, Nice, France
- Institut for Fysik og Astronomi, Aarhus Universitet, Aarhus, Denmark
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