1. Department of Mathematics and Mathematical Statistics Umeå University Umeå Sweden
2. Department of Statistical Sciences Università Cattolica del Sacro Cuore Milan Italy
3. Department of Statistics Umeå School of Business Economics and Statistics Umeå University Umeå Sweden
4. Department of Mathematics Jean Leray UMR CNRS 6629 Nantes University Nantes France
5. MOX – Modelling and Scientific Computing Laboratory Department of Mathematics Politecnico di Milano Milan Italy