1. Medication Development Program; Molecular Targets and Medications Discovery Branch; Department of Health and Human Services; National Institute on Drug Abuse; Intramural Research Program; National Institutes of Health; 333 Cassell Drive Baltimore MD 21224 USA
2. Department of Medicinal Chemistry; The University of Kansas; Lawrence KS USA
3. Medicinal Chemistry Section; Molecular Targets and Medications Discovery Branch; Department of Health and Human Services; National Institute on Drug Abuse; Intramural Research Program, National Institutes of Health; Baltimore MD USA
4. Psychobiology Section; Molecular Neuropsychiatry Research Branch; Department of Health and Human Services; National Institute on Drug Abuse; Intramural Research Program; National Institutes of Health; Baltimore MD USA