| 2017 | Opsonophagocytic Antibodies to Serotype Ia, Ib, and III Group B Streptococcus among Korean Infants and in Intravenous Immunoglobulin Products | 김경효; 이소영; 김한울 | Article |
| 2016 | Optic nerve integrity as a visuospatial cognitive predictor in Parkinson's disease | 신나영 | Article |
| 2020 | Optic nerve sheath diameter as a predictor of acute cerebellar infarction in acute vertigo patients without brain computed tomography abnormalities | 이선화 | Article |
| 2021 | Optic nerve sheath diameter as a predictor of altered mental status in drug intoxication patients | 이선화; 김건 | Article |
| 2018 | Optic nerve sheath diameter measured using early unenhanced brain computed tomography shows no correlation with neurological outcomes in patients undergoing targeted temperature management after cardiac arrest | 한철 | Article |
| 2020 | Optic nerve sheath diameter measurement for predicting raised intracranial pressure in adult patients with severe traumatic brain injury: A meta-analysis | 이선화 | Article |
| 2022 | Optic nerve sheath diameter measurement for predicting raised intracranial pressure in pediatric patients: A systematic review and meta-analysis | 이선화 | Review |
| 2016 | Optimal Bowel Preparation for Video Capsule Endoscopy | 심기남 | Review |
| 2011 | OPTIMAL COMBINATION OF MARKERS FOR SUBCLASSIFICATION OF POORLY DIFFERENTIATED NON-SMALL CELL LUNG CARCINOMA | 성순희 | Meeting Abstract |
| 2001 | Optimal concentration of human epidermal growth factor (hEGF) for epithelial healing in experimental corneal alkali wounds | 박혜영; 한후재; 전루민 | Article |
| 2017 | Optimal Dose and Timing of Umbilical Stem Cells Treatment in Pulmonary Arterial Hypertensive Rats | 홍영미; 김관창 | Article |
| 2014 | Optimal dose of dexmedetomidine for attenuating cardiovascular response during emergence in patients undergoing total laparoscopic hysterectomy | 김용일 | Article |
| 2013 | Optimal dose of prophylactic dexmedetomidine for preventing postoperative shivering | 김용일 | Article |
| 2022 | Optimal duration of the apnea test for determining brain death: Benefit of the short-term apnea test | 홍경숙; 박진; 백승민 | Article |
| 2013 | Optimal hemoglobin A1C Cutoff Value for Diagnosing type 2 diabetes mellitus in Korean adults | 성연아; 오지영; 이혜진 | Article |
| 2014 | Optimal indication of thyroglobulin measurement in fine-needle aspiration for detecting lateral metastatic lymph nodes in patients with papillary thyroid carcinoma | 정진 | Article |
| 2017 | Optimal radiation dose for patients with one to three lymph node positive breast cancer following breast-conserving surgery and anthracycline plus taxane-based chemotherapy: A retrospective multicenter analysis (KROG 1418) | 김규보; 박경란 | Article |
| 2022 | Optimal Surgical Extent in Patients with Unilateral Multifocal Papillary Thyroid Carcinoma | 권형주; 우주현 | Article |
| 2014 | Optimal Tailored Screening Protocol after Living Donor Liver Transplantation for Hepatocellular Carcinoma | 홍근 | Article |
| 2010 | Optimal time for appendectomy in perforated appendicitis of children | 최금자; 정순섭 | Article |
