We randomized @ young adult ED patients who screened positive for past hazardous alcohol use to one of @ groups : SMS assessments + feedback ( SA+F ) intervention who were asked to respond to drinking-related queries and received real-time feedback through SMS each Thursday and Sunday for @ weeks ( n = @ ) , SMS assessments ( SA ) who were asked to respond to alcohol consumption queries each Sunday but did not receive any feedback ( N = @ ) , and a control group who did not participate in any SMS ( n = @ ) .