Low-dose caffeine discrimination in humans.
Griffiths RR, Evans SM, Heishman SJ, Preston KL, Sannerud CA, Wolf B, Woodson PP.
Griffiths RR, et al. Among authors: wolf b.
J Pharmacol Exp Ther. 1990 Mar;252(3):970-8.
J Pharmacol Exp Ther. 1990.
PMID: 2319479
Clinical Trial.