. 2019 Jan 2;63(6):1800868. doi: 10.1002/mnfr.201800868
© 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.
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.
Figure 1.
Study design.