You can read the Hospital Doctor Patient Dataset into Stata and run many linear and generalized linear mixed effects models into Stata using this code. The output is not included, but the syntax is. For more details on the dataset, you should see the original R page that simulates the data HDP Simulation.
*Grab the most recent version from the internet insheet using "https://stats.idre.ucla.edu/stat/data/hdp.csv", comma foreach i of varlist familyhx smokinghx sex cancerstage school { encode `i', gen(`i'2) drop `i' rename `i'2 `i' } xtmixed tumorsize i.familyhx lengthofstay i.cancerstage i.smokinghx##c.age || did: lengthofstay xtmixed co2 i.familyhx lengthofstay i.cancerstage i.smokinghx##c.age || did: lengthofstay xtmixed pain i.sex c.il6##c.crp || did: xtmixed wound rbc i.married##i.sex experience || hid: || did: rbc xtmixed mobility age bmi experience i.school lawsuits medicaid || hid: || did: xtmepoisson ntumors age c.bmi##i.familyhx lengthofstay il6 crp i.cancerstage c.experience##i.cancerstage || hid: || did: xtmepoisson nmorphine age i.sex lengthofstay bmi i.cancerstage || did: bmi xtmelogit remission age lengthofstay i.familyhx il6 crp i.cancerstage experience || hid: || did: lengthofstay *not technically correct, should be a logit link with a beta distribution xtmelogit lungcapacity rbc c.il6#c.crp i.smokinghx##i.familyhx experience i.school || did: