I) When Ronald Reagan's doctors first suspected he had Alzheimer's Disease, it was difficult for them to confirm the diagnosis. II) To determine whether the ex-President had the harmful disease or not, doctors gave him a complex series of physical and psychological tests. III) A team of top scientists and researchers worked around the clock trying to cure the illness. IV) These were, however, mainly to check for other possible causes of his symptoms. V) A whole year passed, therefore, before he was told that he was indeed in the early stages of Alzheimer's.