# Multiple comparisons in a non-parametric test

I am working with a data set that is non-parametric and has 12 treatments. I performed the Kruskal-Wallis test and got a significant $p$-value, and now I would like to conduct a multiple comparisons procedure to see which of the treatments differ significantly. There is a lot of information regarding this topic, but I haven't found anything that specifically addresses this issue. Any ideas??

Dunn's test is implemented for Stata in the package dunntest (from Stata type net describe dunntest, from(https://alexisdinno.com/stata) whilst connected to the Internet), and for R in the package dunn.test; both packages includes many multiple comparison's adjustment options. One might also perform Dunn's test in SAS using Elliott and Hynan's macro, KW_MC.