V. Ratanamart, V. Senanarong, S. Chulakadabba, and P. Chiewvit, “SPECT as An Aid for Clinicians in the Diagnosis of Alzheimer’s Disease: A case report and review of current diagnostic approaches and the need for early accurate diagnosis to optimize treatment”, Siriraj Med J, vol. 55, no. 1, pp. 31–41, Jan. 2003.