Preoperative radiotherapy combined with surgery versus surgery alone for primary retroperitoneal sarcoma: a meta-analysis by Young Rak Kim, Chang-Hyun Lee, Hangeul Park, Jun-Hoe Kim, Chi Heon Kim

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Evaluation of the efficiency of the C-ring aiming guide for atlantoaxial transarticular screw fixation in toy breed dogs by Ji Young Park, Young Rak Kim, Ho Jung Choi, Young Won Lee, Seong Mok Jeong, Hae Beom Lee

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Single-position oblique lumbar interbody fusion with navigation: improved efficiency and screw accuracy compared to dual-position with fluoroscopy by Hangeul Park, Hui Son, Jun-Hoe Kim, Sum Kim, Young-Rak Kim, Chang-Hyun Lee, Chun Kee Chung, Chi Heon Kim

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Healthcare burden changes by restricted physical activities in lumbar spinal stenosis and spondylolisthesis: a retrospective large cohort study during the COVID-19 pandemic by Jun-Hoe Kim, Yebin Chegal, Suhyun Kim, Hangeul Park, Young Rak Kim, Sum Kim, Kwangsoo Kim, Chang-Hyun Lee, Chi Heon Kim, Chun Kee Chung

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Screening patients requiring secondary lumbar surgery for degenerative lumbar spine diseases: a nationwide sample cohort study by Hangeul Park, Juhee Lee, Yunhee Choi, Jun-Hoe Kim, Sum Kim, Young-Rak Kim, Chang-Hyun Lee, Sung Bae Park, Kyoung-Tae Kim, John M. Rhee, Chi Heon Kim

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The utility of intraoperative ultrasonography for spinal cord surgery by Hangeul Park, Jun-Hoe Kim, Chang-Hyun Lee, Sum Kim, Young-Rak Kim, Kyung-Tae Kim, Ji-hoon Kim, John M. Rhee, Woo-Young Jo, Hyongmin Oh, Hee-Pyoung Park, Chi Heon Kim

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