Authors’ contributions
P.
P. Wilson, G. Overbeck, and I. Rasmussen were involved in the study conceptualisation and design. C. Appel were involved in the data preparation. E. Sørensen were involved in the data clean-up and preparation, analyzed the data and discussed the results with V. Siersma. V. Siersma performed the relative importance analysis. The first manuscript was written by E. Sørensen. All authors commented on previous versions of the manuscript and P. Wilson, G. Overbeck, and I. Rasmussen were major contributors. All authors read and approved the final version of the manuscript.