Letters to the Editor

Caudle, R., Finegold, A., Mannes, A., Tobias, M., Kenshalo, D., & Iadarola, M. (1998). Spinal kappa₁ and kappa₂ opioid binding sites in rats, guinea pigs, monkeys, and humans. Neuroreport, 9, 2523-2525.

Dallocchio, C., Buffa, C., Mazzarello, P., & Chiroli, S. (2000). Gabapentin versus amitriptyline in painful diabetic neuropathy: An openlabel pilot study. Journal of Pain and Symptom Management, 20, 280-285.

Grond, S., Radbruch, L., Meuser, T., Sabatowski, R., Loick, G., & Lehmann, K. (1999). Assessment and treatment of neuropathic cancer pain following WHO guidelines. Pain, 79, 15-20.

Lotsch, J., Ditterich, W., Hummel, T., & Kobal, G. (1997). Antinociceptive effects of the kappaopioid receptor agonist RP 60180 compared with pentazocine in an experimental human pain model. Clinical Neuropharmacology, 20, 224-233.

Morello, C., Leckband, S., Stoner, C., Moorhouse, D., & Shagian, G. (1999). Randomized doubleblind study comparing the efficacy of gabapentin with amitriptyline on diabetic peripheral neuropathy pain. Archives of Internal Medicine, 159, 1931-1937.

Pan, Z. (1998). U-opposing actions of the K-opioid receptor. Trends in Pharmacological Sciences, 19, 94-98.

Richeimer, S., Bajwa, Z., Kahraman, S., Ransil, B., & Warfield, C. (1997). Utilization patterns of tricyclic antidepressants in a multidisciplinary pain clinic: A survey. Clinical Journal of Pain, 13, 324-329.

Watson, C., & Babul, N. (1998). Efficacy of oxycodone in neuropathic pain: A randomized trial in postherpetic neuralgia. Neurology, 50, 1837-1841.

Watson, P., Vernich, L., Chipman, M., & Reed, K. (1998). Nortriptyline versus amitriptyline in postherpetic neuralgia: A randomized trial. Neurology, 51, 1166-1171.