proc mixed data=<DATASET> ;

  class treatment trial_id visit <FACTORS>;

  model chgbaseline=treatment visit treatment*visit baseline <FACTORS and COVARIATES > /s alpha=0.05;

  repeated visit/type = cs subject=trial_id;

  lsmeans treatment*visit /cl om;

run;

DATASET: the input dataset

FACTORS: List of factors kept in the model

COVARIATES: List of covariates kept in the model