June 21, 2017 Carolyn Compton. Preanalytical Variables in Blood Collection: Impact on Precision Medicine. Liquid Biopsy Summit. San Francisco, CA (Jun 21, 2017) Home ยป Carolyn Compton. Preanalytical Variables in Blood Collection: Impact on Precision Medicine. Liquid Biopsy Summit. San Francisco, CA (Jun 21, 2017)