| 2013 | | Optimal HbA1c cutoff for detecting diabetic retinopathy. | 조남한 |
| 2011 | | Optimal intravascular ultrasound criteria and their accuracy for defining the functional significance of intermediate coronary stenoses of different locations. | 양형모, 윤명호, 임홍석, 탁승제 |
| 2014 | | Optimal Intravascular Ultrasound Criteria for Defining the Functional Significance of Intermediate Coronary Stenosis: An International Multicenter Study | 양형모, 윤명호, 탁승제 |
| 2019 | | Optimal Multiphase Computed Tomographic Angiography-based Infarct Core Estimations for Acute Ischemic Stroke | 이성준, 이진수, 정우상, 최문희, 최진욱, 홍지만 |
| 2022 | | Optimal Nozzle Position and Patient’s Posture to Enhance Drug Delivery into the Peritoneum during Rotational Intraperitoneal Pressurized Aerosol Chemotherapy in a Swine Model | 장석준 |
| 2012 | | Optimal Pelvic Inlet and Outlet Radiograph Angles in Korean Patients | 원예연 |
| 2018 | | Optimal Phase of Dynamic Computed Tomography for Reliable Size Measurement of Metastatic Neuroendocrine Tumors of the Liver: Comparison between Pre- and Post-Contrast Phases | 허지미 |
| 2022 | | Optimal positive lymph node ratio showing the benefit of postoperative radiotherapy in pathologic N2 non-small cell lung cancer: an exploratory study using the Surveillance, Epidemiology, and End Results data | 노오규 |
| 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) | 전미선 |
| 2014 | | Optimal set of grid size and angular increment for practical dose calculation using the dynamic conformal arc technique: a systematic evaluation of the dosimetric effects in lung stereotactic body radiation therapy. | 박혜진 |
| 2007 | | Optimization of critical factors affecting the performance of an allergen chip for the analysis of an allergen-specific human IgE in serum. | 김승현, 박해심 |
| 2011 | | Optimizing outcome of charles procedure for chronic lower extremity lymphoedema. | 이일재 |
| 2020 | | Optimizing Preparative Regimen for Umbilical Cord Blood Transplantation in Adult Acute Leukemia Patients: Acute Lymphoblastic Leukemia Requires Myeloablative Conditioning but Not Acute Myeloid Leukemia | 박준성 |
| 2024 | | Optimizing the Hospital Blood Bank Stock in Korea: A Comparative Analysis of the Uniform 5-Day Stock Index and a Novel Blood Stock Index | 박서진, 임영애 |
| 2015 | | Optimum Conditions for the Preparation of Red Blood Cell Suspensions for ABO Antibody Titration. | 임영애, 조성란 |
| 2023 | | Optimum selection criteria for secondary cytoreductive surgery in patients with recurrent epithelial ovarian cancer: A multicenter study from the Gynecologic Oncology Research Investigators coLLaborAtion group (GORILLA-3001) | 공태욱, 손주혁, 장석준 |
| 2001 | | Oral administration of IL-12 suppresses anaphylactic reactions in a murine model of peanut hypersensitivity. | 이수영 |
| 2007 | | Oral Administration of Memantine Prolongs Survival in a Transgenic Mouse Model of Amyotrophic Lateral Sclerosis | 주인수 |
| 2014 | | Oral allergy syndrome caused by crown daisy and sesame leaf | 박해심 |
| 2011 | | Oral food challenges in children | 이수영 |
