Sanghyeok Park†, Dae Wook Kim†, Hyun Kim, Joonho Byun, Sangjoon Chong, Sang Woo Song, Young-Hoon Kim, Young Hyun Cho, Seok Ho Hong, Chang-Ki Hong, Jeong Hoon Kim, Seungjoo Lee*, Jae Kyoung Kim*, Ji Min Lee, Effect of tumor resection time-of-day on overall survival of patients with glioblastoma multiforme and a circadian-regulated tumor microenvironment: an observational cohort study