Melds genome-wide association tests with structural
equation modeling (SEM) using 'OpenMx'. This package contains low-level
C/C++ code to rapidly read genetic data encoded in U.K. Biobank or 'plink'
formats. Prebuilt modeling options include one and two factor
models. Alternately, analyses may utilize arbitrary, user-provided SEMs.
See Verhulst, Maes, & Neale (2017)