Visiting a 'cemetery of the brainless' in Denmark

From 1945 to 1982, nearly 10,000 brains from psychiatric patients who died in Danish hospitals were removed and put into a collection for future study. Some patients were buried on the hospital grounds, resulting in what's known as a "cemetery of the brainless." CNN's Dr. Sanjay Gupta visits one to see for himself while reporting for his special documentary "World's Untold Stories: The Brain Collectors."