d STB-54 dm77. Removing duplicate observations in a dataset
d STB insert by Duolao Wang, London School of Hygiene and Tropical Medicine
d Support:  duolao.wang@@lshtm.ac.uk 
d After installation, see help ^unique1^

f dm77/readme 
f dm77/testdata.dta 
f dm77/unique1.ado 
f dm77/unique1.hlp