Excretion of 11-Hydroxy-delta-9-Tetrahydrocannabinol (11-OH-THC), and 11-nor-delta-9-Tetrahydrocannabinol-9-Carboxylic Acid (THCCOOH) in Urine From Chronic Cannabis Users During Monitored Abstinence

Abraham, Tsadik, Baltimore MD; Cadet, Jean L., Baltimore MD; Herning, Ronald I., Baltimore MD; Bolla, Karen, Baltimore MD; Darwin, William D., Baltimore MD; Lowe, Ross H., Baltimore MD; Huestis, Marilyn A., Severna Park MD