Russell E Ericksen1,2, Weiping Han3,4. 1. Singapore Bioimaging Consortium, A*STAR, Singapore, Singapore. re2171@columbia.edu. 2. Duke Molecular Physiology Institute, Duke University, Durham, NC, USA. re2171@columbia.edu. 3. Singapore Bioimaging Consortium, A*STAR, Singapore, Singapore. wh10@cornell.edu. 4. Center for Neuro-Metabolism and Regeneration Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China. wh10@cornell.edu.