d STB-33 snp12.  Stratified test for trend across ordered groups.
d STB insert by Peter Sasieni, Imperial Cancer Research Fund.
d Support:  p.sasieni@@icrf.icnet.uk
d After installation, see help ^npt_s^.
d Note:  stb2.dta is the dataset for the example.

f snp12/_gsrank.ado
f snp12/dotplot.ado
f snp12/npt_s.ado
f snp12/npt_s.hlp
f snp12/stb2.dta