Editorial Note
Crossref DOI link: https://doi.org/10.1007/s10677-016-9765-y
Published Online: 2016-10-23
Published Print: 2016-11
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Musschenga, A. W.
Heeger, F. R.
License valid from 2016-10-23