Author contributions:T. J. Mäkinen: Study concept and design, Acquisition of data, Analysis and interpretation of data, Drafting of the manuscript, Statistical analysis.M. Abolghasemian: Study concept and design, Aacquisition of data, Analysis and interpretation of data, Critical revision of the manuscript for important intellectual content, Statistical analysis.E. Watts: Acquisition of data, analysis and interpretation of data, Statistical analysis, Obtained funding, Administrative support.S. G.