<qa>  What is the name of the two prospective studies based on?This is a series of two prospective studies based on the Department of Veterans Affairs drug treatment guideline for the pharmacologic management of gastroesophageal reflux disease. Our hypothesis is that novel strategies for medical management of gastroesophageal reflux disease GERD can decrease resource utilization without adversely affecting patient quality of life. The strategies tested in this project included 1 step-down management, whereby patients rendered asymptomatic on proton pump inhibitors PPIs are treated with less expensive medication, and 2 intermittent therapy, defined as administration of medication only for recurrence of GERD symptoms. We chose to examine an intermittent strategy of PPI administration since in addition to the VA guideline requiring step-down therapy, over-the-counter PPIs administered by intermittent therapy became available for use by patients during the study period. 