The amount of a ecto-ADP-ribosyltransferase 5 (human) when measured in cerebrospinal fluid. The trait is level of ecto-ADP-ribosyltransferase 5 (human) in cerebrospinal fluid (OBA_2080463). Also known as: cerebrospinal fluid ecto-ADP-ribosyltransferase 5 (human) amount.