Time Trends in the Prevalence of Neurocognitive Disorders and Cognitive Impairment in the United States: The Effects of Disease Severity and Improved Ascertainment. Akushevich I, Yashkin AP, Kravchenko J, Ukraintseva S, Stallard E, Yashin AI J Alzheimers Dis. 2018; 64(1):137-148. PMID: 29865067. Abstract Comment Bookmark Recommend Follow Comment | Bookmark | Recommend | Follow