The amount of a EF-hand calcium-binding domain-containing protein 4B (human) when measured in cerebrospinal fluid. The trait is level of EF-hand calcium-binding domain-containing protein 4B (human) in cerebrospinal fluid (Ontology of Biological Attributes entry OBA_2080695). Also known as: cerebrospinal fluid EF-hand calcium-binding domain-containing protein 4B (human) amount.