The amount of a complement C1q and tumor necrosis factor-related protein 9A (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes id OBA_2056982 (level of complement C1q and tumor necrosis factor-related protein 9A (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid complement C1q and tumor necrosis factor-related protein 9A (human) amount.