Authors’ contributions
All authors have confirmed responsibility for the reported research and approved the final manuscript as submitted. TSG drafted the initial manuscript and carried out statistical analyses. CGo, IK, and CGh participated with the concept and design, in the interpretation of the data, and in drafting and revising the manuscript. JA carried out statistical analyses, made graphics, and participated in the interpretation of the data and in revising the manuscript. ASS and LB participated in the interpretation of the data and in revising the manuscript.