to-do

*** NOW

*** LATER
* Add mean_sd_plot function from Rcomps
* Equivalence plot (w/ single- or multi-zone options)
* Add ASCVD risk calculation
  - http://tools.acc.org/ASCVD-Risk-Estimator-Plus/#!/calculate/estimate/
  - https://www.ahajournals.org/doi/full/10.1161/01.cir.0000437741.48606.98
    ^^ See Appendix 7
  - https://www.ahajournals.org/doi/full/10.1161/01.cir.0000437738.63853.7a
* Add Framingham CVD risk calculation
  - https://www.ahajournals.org/doi/full/10.1161/01.CIR.97.18.1837
* Add NIDDK Body Weight Planner algorithm?