"'Significant, important, excellent. It provides a comprehensive 'state of the art' analysis. Not only is dementia in Alzheimer's disease emerging as the greatest challenge for those charged with the health and community care of people who are ageing with an intellectual disability; it is a similar challenge for the dramatically increasing numbers of older people in the general population. The scientific community investigating one of the most serious health challenges facing adults with an intellectual disability is indebted to Dr Vee Prasher and colleagues for this scholarly contribution to the study of the biological correlates of dementia in Alzheimer's disease in adults with Down syndrome. This important collection of the most recent research findings in this field of enquiry will further stimulate efforts to develop treatments that may ameliorate the condition; delay its onset, and ultimately provide means for prevention.' Trevor R Parmenter, in the Foreword"