The mean age is 33. Most persons are between 16 and 30 years of age. There is a 4:1 male:female ratio and most persons are white although blacks are at higher risk than whites. The percentage of cases occurring among blacks has been increasing in recent years.
Must Read
Global Accessibility Awareness Day
Join an event or webinar, and engage in the discussion of how to make the internet more accessible to all, including a wide range...
