A 58-year-old man with obesity and a 1-year history of classic GERD symptoms has been on a therapeutic dose if a PPI for the past 6 months. He states he is “really no better with the medicine and I have cut out most of the food that bothers my stomach. I even cut out all alcohol and soda.” Physical examination reveals stable weight, mildly erythematous pharynx, and epigastric tenderness without rebound. Next step options include: