Q. A 37-year-old man presents with a couple month history of pain in the midepigastric region that improves with eating. He also describes a history of nausea and vomiting that is intermittent. He denies any bloody stools, his weight has been fairly stable (although he has been lifting weights and has gained "a few pounds of muscle"), and he denies any trouble swallowing. He has no other significant past medical history, takes no medications, and has no major family history for malignancies. Temperature is 36.7 (98.7 F), Blood Pressure is 146/84, Heart Rate is 64 beats/minute. Cardiopulmonary auscultation is normal. No masses present on abdominal examination and there is no tenderness to palpation. What is the most appropriate next step in management?