Pain relief associated with decreased oxyhemoglobin level in left dorsolateral prefrontal cortex. - Miyashiro, Shun; Yamada, Yurika; Nagaoka, Masaru; Shima, Rei; Muta, Toshizumi; Ishikawa, Haruyuki; Abe, Tetsuri; Hori, Masashi; Oka, Kotaro; Koshikawa, Fusako; Ito, Etsuro (PLoS ONE, 2021)