What is the fine-grained topic of the following text: In a research study conducted by Hyon Choi, MD, DrPH, clinical associate professor of medicine in rheumatology at Boston University School of Medicine, participants who consumed two or more sugar or fructose-sweetened sodas each day had an 85 percent increase in developing gout. Only return the topic.
The impact of fructose-sweetened sodas on gout development.