Foguem, Clovis, and Gérard Brand. “Comparison of Olfactory Thresholds Between Elderly With Parkinson Disease and Controls ”. Journal of Aging and Gerontology 2, no. 1 (February 5, 2014): 5–12. Accessed May 10, 2025. http://www.savvysciencepublishers.com/index.php/jag/article/view/236.