1 Research project manager, Research and Data Integration, Federation of State Medical Boards, Euless, Texas; karnhart@fsmb.org ; ORCID: http://orcid.org/0000-0001-9975-6358 .
2 Measurement scientist, Office of Research Strategy, NBME, Philadelphia, Pennsylvania; ORCID: http://orcid.org/0000-0002-5756-9113 .
3 Chief assessment officer, Federation of State Medical Boards, Euless, Texas; ORCID: http://orcid.org/0000-0003-3669-1838 .