d STB-54 March 2000 t .. Other STBs p dm73_1 Contrasts for categorical variables: update p dm76 ICD-9 diagnostic and procedure code utility p dm77 Removing duplicate observations in a dataset p gr34_3 An update to drawing Venn diagrams p gr43 Overlaying graphs p ip29_1 Metadata for user-written contributions to Stata p sbe32 Automated outbreak det. for pub. health surveillance data p sg116_1 Update to hotdeck imputation p sg120_2 Correction to roccomp command p sg130 Box-Cox regression models p sg132 Analysis of variance from summary statistics p sg133 Sequential and drop one term likelihood-ratio tests p sg134 Model selection using the Akaike information criterion p sg84_2 Concordance correlation coefficient: update for Stata 6 p sxd1_2 Random allocation of treatments bal. in blocks: update