1. Department of Statistics and OR, Complutense University of Madrid, Spain
2. Instituto de Matemtica Interdisciplinar (IMI), Complutense University of Madrid, Spain
3. Laboratory of Biometry, School of Agricultural Sciences, University of Thessaly, Greece
4. University Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Switzerland
5. Department of Statistics, University of Haifa, Israel