Primary somatosensory cortex and periaqueductal gray functional connectivity as a marker of the dysfunction of the descending pain modulatory system in fibromyalgia. - Soldatelli, Matheus; de Oliveira Franco, Álvaro; Picon, Felipe; Ávila Duarte, Juliana; Scherer, Ricardo; Bandeira, Janete; Zortea, Maxciel; da Silva Torres, Iraci Lucena; Fregni, Felipe; Caumo, Wolnei (Korean Journal of Pain, 2023)