Received: 13 December 2018
Revised: 21 June 2019
Accepted: 30 June 2019
First Online: 27 August 2019
Compliance with ethical standards
: MAvB, ECM, RGV, and NJTR declare that they have no conflict of interest. CCC and ACA are employed by Eli Lilly and Company. This study was supported by the Netherlands Organisation for Scientific Research TOP, Grant Number: 200500001.