What is the fine-grained topic of the following text: "This is a very important study because it's the first randomized trial comparing bariatric surgery to medical treatment of diabetes with five years of follow-up," said Dr. Philip Schauer, who directs the Bariatric and Metabolic Institute at the Cleveland Clinic, according to HealthDay wrote. Only return the topic.
Randomized trial comparing bariatric surgery and medical treatment of diabetes