Fig. 1

Measured metabolites in cerebrospinal fluid. A The numbers of metabolites detected in different proportions of samples. B The numbers of metabolites in each metabolite class detected in different proportions of samples. Notes: AC, acylcarnitines; CE, cholesteryl esters; Cer, ceramides; DG, diglycerides; H1, hexoses; LPC, lysophosphatidylcholines; PC, phosphatidylcholines; SM, sphingomyelins; TG, triglycerides