Al-Shimmari, Haydar A, et al. “Analysis of Brainstem Activitywith FMRI During Low-Level of Pain- a Feasibility Study With Innocuous Cold Stimuli”. Diyala Journal of Medicine, vol. 11, no. 1, May 2019, pp. 50-61, https://www.djm.uodiyala.edu.iq/index.php/djm/article/view/231.