1. StepReg::creditCard
    creditCard
    csv| xlsx| json| ndjson| rda| rds
    data.frame|1319 x 12
  2. StepReg::remission
    remission
    csv| xlsx| json| ndjson| rda| rds
    data.frame|27 x 7
  3. StepReg::tobacco
    tobacco
    csv| xlsx| json| ndjson| rda| rds
    data.frame|25 x 9