| 2014 | Optimal Intravascular Ultrasound Criteria for Defining the Functional Significance of Intermediate Coronary Stenosis: An International Multicenter Study | 남창욱 |
| 2016 | Optimal length of the pre-inserted tracheal tube for excellent view in nasal fiberoptic intubation | 이지원 |
| 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) | 김진희 |
| 2018 | Optimal surgical treatment in patients with T1b gallbladder cancer:An international multicenter study | 안근수; 강구정 |
| 2018 | Optimal Timing of Percutaneous Coronary Intervention in Patients With Non-ST-Segment Elevation Myocardial Infarction Complicated by Acute Decompensated Heart Failure (from the Korea Acute Myocardial Infarction Registry-National Institutes of Health [KAMIR-NIH]). | 허승호 |
| 2019 | Optimization of Percutaneous Coronary Intervention Using Optical Coherence Tomography | 이철현; 허승호 |
| 2012 | Optimization of Stent Deployment by Intravascular Ultrasound | 윤혁준; 허승호 |
| 2015 | Orexin A regulates plasma insulin and leptin levels in a time-dependent manner following a glucose load in mice | 박재형; 배재훈; 임승순; 송대규 |
| 2019 | Orexin A-induced Inhibition of Leptin Expression and Secretion in Adipocytes Reducing Plasma Leptin Levels and Hypothalamic Leptin Resistance | 배재훈; 임승순; 김지인; 송대규 |
| 2017 | Orexin receptors mediate long-term depression of excitatory synaptic transmission in the spinal cord dorsal horn | 박기범 |
| 2004 | Organ allocation for transplantation in the USA and Korea: the changing roles of equity and utility | 조원현 |
| 2011 | Origin of isolated vertigo in rotational vertebral artery syndrome | 김현아; 이현아; 이형; 이창영 |
| 2009 | Orphan Nuclear Receptor Small Heterodimer Partner Attenuates Renal Fibrosis in Obstructive Nephropathy | 정권수 |
| 2010 | Orphan nuclear receptor small heterodimer partner inhibits
angiotensin II-stimulated PAI-1 expression in vascular smooth
muscle cells | 김미경; 류성열; 김윤년; 박근규 |
| 2016 | Orthostatic hypertension: An underestimated cause of orthostatic intolerance | 이형; 김현아 |
| 2016 | Orthostatic hypotension in acute cerebellar infarction | 김현아; 이형 |
| 2015 | Orthostatic hypotension in acute vestibular neuritis | 김현아; 이현아; 이형 |
| 2018 | Orthostatic tachycardia with different onset time in patients with orthostatic intolerance | 이형; 김현아 |
| 2002 | Osseointegrated alloplastic ear reconstruction with the implant-carrying plate system in children | 한기환; 손대구 |
| 2003 | Osteochondral Flap Fracture of the Olecranon With Dislocation of the Elbow in a Child: A Case Report | 송광순; 전시현 |
