After reading the articles from the Sleep Foundation and the Mayo Clinic, the information presented in each does not match. According to the Sleep Foundation report, sleeping on your back or side has more advantages than sleeping on your stomach. This runs counter to the Mayo Clinic article's assertion, which cites the Sleep Foundation as a source to support it. Despite the fact that Dr. Krahn provided the data, I believe that the Mayo Clinic paper isn't very trustworthy for this reason.