. 2018 Apr 26;38(19):3540–3554. doi: 10.1002/sim.7696
© 2018 The Authors. Statistics in Medicine Published by John Wiley & Sons Ltd
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.