The recent increase in Alzheimer's disease cases is alarming. There have been genetic causes that have been identified, but there are also some environmental and lifestyle factors that have been linked to an increased risk of Alzheimer's. What are some of these risk factors? Consequently there are different demographic groups (e.g. race, age, gender) are at higher risk that others for developing Alzheimer's. Do you know which groups are more prone to this disease? (Be sure to cite your sources.)