SAS Related Code and Article

 Using Kernel Density Estimation (KDE)
https://www.mwsug.org/proceedings/2012/DV/MWSUG-2012-DV06.pdf

Stepwise Logistic Regressions
http://www2.sas.com/proceedings/sugi27/p219-27.pdf

SAS Code
http://ncook.bwh.harvard.edu/sas-macros.html

SAS Macro (vintage)
https://github.com/friendly