. Author manuscript; available in PMC: 2024 Mar 1.
Published in final edited form as: J Clin Epidemiol. 2017 Jul 15;90:28–36. doi: 10.1016/j.jclinepi.2017.06.014
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).