1. From the School of Biological Sciences, Nanyang Technological University, Singapore (A.S., X.G.-P., J.E.P., J.P.T., S.K.S.)
2. Neurodegeneration Research Laboratory, National Neuroscience Institute, Singapore (G.G.Y.L., K.L.L.)
3. Department of Physiology, National University of Singapore (K.L.L.)
4. Department of Cardiology, Tan Tock Seng Hospital, Singapore (H.H.H.).