Text and Data Mining valid from 2018-06-12
First Online: 12 June 2018
Compliance with Ethical Standards
: The authors declare no competing financial interests. This research was supported by a Netherlands Organisation for Scientific Research (NWO) grant to UB (406-12-125), an NWO Veni grant to DM (451-15-010), and a European Research Council (ERC) grant to EJW.