Fan M, Sidhu R, Fujiwara H, Tortelli B, Zhang J, Davidson C, Walkley SU, Bagel JH, Vite C, Yanjanin NM, Porter FD, Schaffer JE, Ory DS. Identification of Niemann-Pick C1 disease biomarkers through sphingolipid profiling. Journal of Lipid Research. 2013 Oct;54(10):2800–14. doi: 10.1194/jlr.m040618.