- Combined Analysis of CSF Tau Levels and [(123)I]Iodoamphetamine SPECT in Mild Cognitive Impairment: Implications for a Novel Predictor of Alzheimer's Disease. Okamura, N., Arai, H., Maruyama, M., Higuchi, M., Matsui, T., Tanji, H., Seki, T., Hirai, H., Chiba, H., Itoh, M., Sasaki, H. The American journal of psychiatry. (2002)