Prior to transfer to Delve Tube:
CSF samples can be stored <6 hours at room temperature, ≤5 days at 2-8°C, <90 days at <-20°C. No more than 2 freeze/thaw cycles.
After transfer to Delve Tube:
Samples in the Delve Tube can be stored ambient for 1 month, up to 2 months at 2-8°C, up to 90 days at <-20°C.