Author contributions
Francesco Bavato: data analysis and interpretation, drafting the article;Fabrizio Esposito: data analysis and interpretation; critical revision of the article; Dario A. Dornbierer: project conceptualization and planning; data collection; Niklaus Zölch: data collection, data analysis, and interpretation; Boris B. Quednow: project conceptualization and planning, critical revision of the article; Philipp Stämpfli: data collection; Hans-Peter Landolt: project conceptualization and design, critical revision of the article; Erich Seifritz: project conceptualization and design, critical revision of the article; Oliver G. Bosch: project conceptualization and design, data collection, drafting the article.