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Open Access
Correction
Correction: Risk factors for critical COVID-19 illness during Delta- and Omicron-predominant period in Korea; using K-COV-N cohort in the National health insurance service
Kyung-Shin Lee,
Min Jin Go,
Youn Young Choi,
Min-Kyung Kim,
Jaehyun Seong,
Ho Kyung Sung,
Jaehyun Jeon,
Hee-Chang Jang,
Myoung-Hee Kim
Correction: Risk factors for critical COVID-19 illness during Delta- and Omicron-predominant period in Korea; using K-COV-N cohort in the National health insurance service
