M. Sheng, Lu, H., Liu, P., Li, Y., Ravi, H., Peng, S. - L., Diaz-Arrastia, R., Devous, M. D., and Womack, K. B.,
“Sildenafil Improves Vascular and Metabolic Function in Patients with Alzheimer's Disease.”,
J Alzheimers Dis, vol. 60, no. 4, pp. 1351-1364, 2017.