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Protocols for collection and storage of CSF. a Schematic presentation of the collection and storage of CSF. Numbers refer to the protocol number, with (numbers 11–20) or without (numbers 1–10) addition of detergent at the time of CSF collection. b Variables included in the study design. c Recipients selected for the study. CSF cerebrospinal fluid, CV coefficient of variation, Liquid N2 Liquid nitrogen, LoB low protein binding, LP lumbar puncture, PL parameter logistic, PP polypropylene
