Razavi, Yasaman, et al. “Chemical Stimulation of the Lateral Hypothalamus Potentiated the Sensitization to Morphine in Rats: Involvement of Orexin-1 Receptor in the Ventral Tegmental Area”. EXCLI Journal, vol. 13, Sept. 2014, pp. 1120-3, https://www.excli.de/index.php/excli/article/view/766.