1 Department of Statistics, Faculty of Science and Letters, Mimar Sinan Güzel Sanatlar Üniversitesi, Istanbul, Turkey. nihan.acar@msgsu.edu.tr.
2 Department of Statistics and Operational Research, Universitat Politècnica de Catalunya, Barcelona, and Primary Healthcare Transversal Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.
3 Sjögren's Syndrome Research Group (AGAUR), Laboratory of Autoimmune Diseases Josep Font, IDIBAPS-CELLEX, Barcelona; Department of Autoimmune Diseases, ICMiD, Hospital Clínic, Barcelona, and Department of Medicine, University of Barcelona, Spain. mramos@clinic.cat.