Efficacy and Cost Effectiveness of Lansoprazole Versus Omeprazole in Maintenance Treatment of Symptomatic Gastroesophageal Reflux DiseaseByEva Vivian, PharmD,Anthony Morreale, PharmD, BCPS, MBA,Eric Boyce, PharmD,Kimberly Lowry, PharmD,Oscar Ereso, PharmD,Patricia Hlavin, MDJuly 1st 1999