Performing repeated measures multivariate regression in stata

I am looking at a dataset on micro-nutrient supplementation to a group of patients. Each patient has up to three micro-nutrient measurements taken over three months. I would like to see the effect of supplementation over this period. How do I deal with within subject correlation as well as between variable (multiple nutrient variables measured) correlation in STATA? mvreg in STATA deals with correlation between variables but does not deal with the repeated nature of measurements within subject.