Utility of crossover designs in clinical trials: efficacy of desipramine vs. placebo in opioid-dependent cocaine abusers.
Feingold A, Oliveto A, Schottenfeld R, Kosten TR. Utility of crossover designs in clinical trials: efficacy of desipramine vs. placebo in opioid-dependent cocaine abusers. Am J Addict. 2002; 11(2):111-23.