The amount of a all-trans-retinol dehydrogenase [NAD(+)] ADH1B (human) when measured in cerebrospinal fluid. The trait is level of all-trans-retinol dehydrogenase [NAD(+)] ADH1B (human) in cerebrospinal fluid (OBA_2056579). Also known as: cerebrospinal fluid all-trans-retinol dehydrogenase [NAD(+)] ADH1B (human) amount.