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George N. Ioannou

university of washington

69H-index
383Paper Count
1.8WCitation Count
Published Papers 190
Publication Date
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Prior surveillance can bias cross-sectional validation of novel HCC biomarkers: incumbent test bias
errJournal of Hepatology
IF33
err2026-06-25
err0
PREAI
errGeorge N. Ioannou
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Can we consider stopping hepatocellular carcinoma surveillance in low-risk patients with hepatitis B?
errExpert Review of Anticancer Therapy
IF2.8
err2026-04-01
err0
PREAI
errKim, Nicole J.; Kim, H. Nina; Mcmahon, Brian J.; Kowalski Frank, Lesleigh; Ioannou, George N.
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Rates and Factors Associated With Hepatocellular Carcinoma Diagnosis, Stage, Treatment, and Survival
errGastro Hep Advances
IF0
err2026-01-01
err0
errOAAI
errIoannou, George N.; Yakovchenko, Vera; Taddei, Tamar; Monto, Alexander; Patton, Heather; Merante, Monica; Spoutz, Patrick; Chia, Linda; Yudkevich, Jennifer; Aytaman, Ayse; Rabiee, Atoosa; John, Binu; Blechacz, Boris; Cai, Cindy X.; Gilles, Hochong; Shah, Anand S.; McCurdy, Heather; Puri, Puneet; Jou, Janice; Mazhar, Khurram; Taborda-Vidarte, Cesar; Ravi, Sujan; Limaye, Alpna; Mandalia, Amar B.; Rupert, Karlyn; Dominitz, Jason A.; Anwar, Jennifer; Morgan, Timothy R.; Rogal, Shari S.
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Effectiveness of the 2024–2025 KP.2 COVID-19 vaccines in the United States during long-term follow-up
errNature Communications
IF15.7
err2025-12-24
err0
errOAAI
errGeorge N. Ioannou; Kristin Berry; Lei Yan; Yuan Huang; Hung-Mo Lin; David Bui; Denise M. Hynes; Edward J. Boyko; Jacqueline M. Ferguson; Mihaela Aslan; Kristina L. Bajema
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Intravascular Hepatocyte Lipid Droplets Are Commonly Present in Hepatic Sinusoids, Portal Venules, and Central Veins in MASH
errGastro Hep Advances
IF0
err2025-12-01
err0
errOAAI
errIoannou, George N.; Savard, Christopher; Dempse, Joseph L.; Carr, Rotonya M.; Lee, Sum P.
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Illness Experiences of Veterans Reporting Long-Term Symptoms or Health Challenges from COVID-19: Results from the VA COVID-19 Observational Research Collaboratory
errJournal of General Internal Medicine
IF4.2
err2025-12-01
err0
PREAI
errAnn M. O’Hare; Kara Montague; Denise M. Hynes; Alexandra Fox; Vivian Nye; Theodore J. Iwashyna; Hannah Card; Anais Tuepker; Mark Helfand; Elizabeth K. Vig; Catherine R. Butler; Janelle S. Taylor; Elizabeth M. Viglianti; Barbara E. Jones; Sara J. Knight; Tammy L. Eaton; C. Barrett Bowling; Matthew L. Maciejewski; Amy S. Bohnert; George N. Ioannou; Shannon M. Nugent
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Changes in Liver Disease Etiology Support a Lower Alpha-Fetoprotein Threshold for Hepatocellular Carcinoma Screening
errGastroenterology
IF25.1
err2025-11-14
err0
PREAI
errNicole J. Kim; Muyi Li; Philip Vutien; Bret Mecham; Joleen Borgerding; Kayta Swarts; Pranusha Atuluru; Martha C. Michel; Abbey Barnard Giustini; Catherine Mezzacappa; Kristin Berry; Trang VoPham; Tracey L. Marsh; Ziding Feng; Kay M. Johnson; Lauren A. Beste; David E. Kaplan; Tamar H. Taddei; George N. Ioannou
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Practice Changing RCT Design and Rationale: Abbreviated MRI plus AFP vs ultrasound plus AFP for HCC surveillance in cirrhosis (PREMIUM study)
errJHEP Reports
IF7.5
err2025-11-06
err0
errOAAI
errGeorge N. Ioannou; Tamar H. Taddei; Beata M. Planeta; Grant D. Huang; Noel S. Weiss; Timothy R. Morgan; Jason A. Dominitz; Ghassan K. Abou-Alfa; Mustafa R. Bashir; Michael V. Beheshti; Amit G. Singal; Cynthia A. Moylan; Robin J. Boland; Lynn F. Buchwalder; Rajni L. Mehta; Kimberly S. Hoisington; Nhan V. Do; Shari S. Rogal; David E. Kaplan; Jihane M. Benhamou; Grace L. Su; Linda M. McDonald; Genta Dani; Dell P. Dunn; Stephanie T. Chang; Ifeyinwa Y. Onyiuke; Ashu Sharma; Tassos C. Kyriakides
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Soluble Triggering Receptor Expressed on Myeloid Cells 2 is a Biomarker but Not a Mediator of Fibrosing Steatohepatitis
errGastro Hep Advances
IF0
err2025-11-01
err0
errOAAI
errDempsey, Joseph L.; Savard, Christopher; Kothari, Vishal; Tang, Jingjing; Lee, Sum P.; Bornfeldt, Karin E.; Carr, Rotonya M.; Ioannou, George N.
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Impact of time zero designation on estimated COVID-19 antiviral effectiveness in observational studies
errAMERICAN JOURNAL OF EPIDEMIOLOGY
IF4.8
err2025-11-01
err0
PREAI
errBajema, Kristina L.; Yan, Lei; Berry, Kristin; Bui, David; Lin, Hung-Mo; Huang, Yuan; Li, Yuli; Rajeevan, Nallakkandi; Maciejewski, Matthew L.; Smith, Valerie A.; Bohnert, Amy S. B.; Hynes, Denise M.; Aslan, Mihaela; Ioannou, George N.
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Budget Impact of Adopting Nirmatrelvir-Ritonavir for Treating COVID-19 in a Large Integrated Healthcare System
errOPEN FORUM INFECTIOUS DISEASES
IF3.8
err2025-10-01
err0
errOAAI
errBui, David P.; Hynes, Denise M.; Wong, Edwin; Vergun, Robert; Yan, Lei; Li, Yuli; Rajeevan, Nallakkandi; Berry, Kristin; Lin, Hung-Mo; Huang, Yuan; Govier, Diana J.; Aslan, Mihaela; Ioannou, George; Bajema, Kristina L.
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Veteran Mental Health Emergency Care Utilization Following SARS-CoV-2 Infection
errHealth Services Research
IF3.2
err2025-06-05
err0
PREAI
errJason I. Chen; Meike Niederhausen; David P. Bui; Diana J. Govier; Mazhgan Rowneki; Alex Hickok; Troy A. Shahoumian; Megan Shepherd-Banigan; Anna Korpak; Eric Hawkins; Alan R. Teo; Jennifer Naylor; Thomas F. Osborne; Valerie A. Smith; C. Barrett Bowling; Edward J. Boyko; George N. Ioannou; Matthew L. Maciejewski; Ann M. O'Hare; Elizabeth M. Viglianti; Theodore J. Iwashyna; Amy S. B. Bohnert; Denise M. Hynes; VA HSR&D COVID-19 Observational Research Collaboratory (CORC)
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Global Health Policies for Hepatocellular Carcinoma: A Cross-Sectional Study
errClinical Gastroenterology and Hepatology
IF12
err2025-05-12
err0
PREAI
errDouglas Chee; Christen En Ya Ong; Darren J.H. Tan; Jörn M. Schattenberg; George N. Ioannou; Daniel Q. Huang
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MASLD and non-liver-related mortality: Association, independent association and causality
errJournal of Hepatology
IF33
err2025-04-18
err0
PREAI
errGeorge N. Ioannou
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Target Trial Emulation of Severe Acute Respiratory Syndrome Coronavirus 2 Infection Versus No Infection and Risk of Post-Coronavirus Disease 2019 Conditions in the Omicron Variant Versus Prior Eras
errCLINICAL INFECTIOUS DISEASES
IF7.3
err2025-04-01
err0
PREAI
errIoannou, George N.; Berry, Kristin; Rajeevan, Nallakkandi; Li, Yuli; Yan, Lei; Huang, Yuan; Bui, David; Hynes, Denise M.; Rowneki, Mazhgan; Hickok, Alex; Niederhausen, Meike; Shahoumian, Troy A.; Bohnert, Amy; Boyko, Edward J.; Korpak, Anna; Fox, Alexandra; Baraff, Aaron; Iwashyna, Theodore J.; Maciejewski, Matthew L.; Smith, Valerie A.; Berkowitz, Theodore S. Z.; Pura, John A.; Hebert, Paul; Wong, Edwin S.; O'Hare, Ann M.; Osborne, Thomas F.; Viglianti, Elizabeth M.; Aslan, Mihaela; Bajema, Kristina L.
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Veterans at High Risk for Post-COVID-19 Suicide Attempts or Other Self-Directed Violence
errJAMA NETWORK OPEN
IF9.7
err2025-03-04
err0
errOAAI
errBui, David P.; Niederhausen, Meike; Hickok, Alex W.; Govier, Diana J.; Rowneki, Mazhgan; Naylor, Jennifer C.; Hawkins, Eric; Boyko, Edward J.; Iwashyna, Theodore J.; Viglianti, Elizabeth M.; Ioannou, George N.; Chen, Jason I.; Hynes, Denise M.
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Severity and Long-Term Mortality of COVID-19, Influenza, and Respiratory Syncytial Virus
errJAMA INTERNAL MEDICINE
IF23.3
err2025-01-27
err2
PREAI
errBajema, Kristina L.; Bui, David P.; Yan, Lei; Li, Yuli; Rajeevan, Nallakkandi; Vergun, Robert; Berry, Kristin; Huang, Yuan; Lin, Hung-Mo; Aslan, Mihaela; Ioannou, George N.
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Respiratory syncytial virus vaccine effectiveness among US veterans, September, 2023 to March, 2024: a target trial emulation study
errThe Lancet Infectious Diseases
IF0
err2025-01-01
err0
PREAI
errKristina L Bajema; Lei Yan; Yuli Li; Stephanie Argraves; Nallakkandi Rajeevan; Alexandra Fox; Robert Vergun; Kristin Berry; David Bui; Yuan Huang; Hung-Mo Lin; Denise M Hynes; Cynthia Lucero-Obusan; Patricia Schirmer; Francesca Cunningham; Grant D Huang; Mihaela Aslan; George N Ioannou
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Global Prevalence, Clinical Characteristics, Surveillance, Treatment Allocation, and Outcomes of Alcohol-Associated Hepatocellular Carcinoma
errCLINICAL GASTROENTEROLOGY AND HEPATOLOGY
IF12
err2024-12-01
err1
PREAI
errZeng, Rebecca Wenling; Ong, Christen En Ya; Ong, Elden Yen Hng; Chung, Charlotte Hui; Lim, Wen Hui; Xiao, Jieling; Danpanichkul, Pojsakorn; Law, Jia Hao; Syn, Nicholas; Chee, Douglas; Kow, Alfred Wei Chieh; Lee, Sung Won; Takahashi, Hirokazu; Kawaguchi, Takumi; Tamaki, Nobuharu; Dan, Yock Young; Nakajima, Atsushi; Wijarnpreecha, Karn; Muthiah, Mark D.; Noureddin, Mazen; Loomba, Rohit; Ioannou, George N.; Tan, Darren Jun Hao; Ng, Cheng Han; Huang, Daniel Q.
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Change in frailty among older COVID-19 survivors
errJOURNAL OF THE AMERICAN GERIATRICS SOCIETY
IF4.5
err2024-11-09
err0
PREAI
errSeligman, Benjamin; Wysham, Katherine D.; Shahoumian, Troy; Orkaby, Ariela R.; Goetz, Matthew Bidwell; Osborne, Thomas F.; Smith, Valerie A.; Maciejewski, Matthew L.; Hynes, Denise M.; Boyko, Edward J.; Ioannou, George N.
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Research Directions

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Co-authors
Cooperation Journals
J
Joseph J.�Y. Sung
H-index: 171 · Papers: 2.2K
G
George P. Chrousos
H-index: 169 · Papers: 2.0K
H
Hashem B. El‐Serag
H-index: 141 · Papers: 1.1K
余君 cover
余君 (Jun Yu)
H-index: 133 · Papers: 1.8K
C
Claude B. Sirlin
H-index: 128 · Papers: 773
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