Doug Figg. Write the collection time on the vacutainer tube and place the sample on wet ice immediately after collection. The sample should be picked up within 1 hour of collection. Please e-mail NCIBloodcore@mail.nih.gov at least 24 hours before transporting samples (the Friday before is preferred). For sample pickup, page 102-11964. For immediate help, call 240-760-6180 (main blood processing core number) or, if no answer, 240-760-6190 (main clinical pharmacology lab number). 37 Short Title: Enzalutamide Vaccine in mCRPC Version Date: 03/29/2022 For questions regarding sample processing, contact NCIBloodcore@mail.nih.gov The samples will be processed, barcoded, and stored in Dr. Figg’s lab until requested by the investigator. 4.1.6 Serum analysis Of the sample collected in Section 4.1.1.2, de-identified serum may be sent for analysis of pre- treatment, on-treatment, on progression and post-treatment absolute concentrations of steroids and ratios of 11BHSD substrates and products with presence of treatment and the nature of the clinical response to enzalutamide. The serum samples may be sent under an MTA to the laboratory of Dr.