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Organizational Structure

OUTCOMES RESEARCH Consortium is a consortium of more than 100 collaborating investigators. The administrative center for the non-profit consortium is the Department of Outcomes Research at the Cleveland Clinic. However, its members hold individual appointments at more than 50 institutions.


Major Regional Directors


Daniel I. Sessler, M.D.


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:: Download a copy of Dr. Sessler's curriculum vitae. (PDF / 7.9MB)
:: Download a high-resolution photograph of Dr. Sessler. (JPG/340KB)
:: MedLine Citations
:: Article about Dr. Sessler in NIH Findings
:: Ximena Valdes, M.D. (Dr. Sessler's wife)
      Marcela Valdes, M.A. (daughter)
      Claudia Valdes, M.A. (daughter)
:: Andrew Sessler, Ph.D. (Dr. Sessler's father)
:: Jonathan Sessler, Ph.D. (Dr. Sessler's brother)
:: Ruth Sessler D.M. (Dr. Sessler’s sister)
      Ruth Sessler's website

Dr. Sessler attended medical school at Columbia University, and subsequently completed pediatric and anesthesia residencies at the University of California, Los Angeles. After stints as professor at UCSF and vice dean at the University of Louisville, his current position is Michael Cudahy Professor and Chair of the Department of Outcomes Research at the Cleveland Clinic.

Dr. Sessler published a book on therapeutic hypothermia and more than 875 full research papers including two-dozen in the New England Journal of Medicine and Lancet. More than 120 of his papers were accompanied by editorials, and more than two-dozen were cover articles for major anesthesia journals since 2010. Dr. Sessler’s papers have been cited more than 55,000 times in peer-reviewed articles — making him the world’s most published and cited anesthesiologist. He is among the top 0.02% of cited scientists in any field, with an H Index of 112.

Dr. Sessler has been a principal or co-investigator on grants totaling more than $80 million. He was an editor of Anesthesiology for 9 years, and serves as a director for the Foundation for Anesthesia Education and Research (FAER). He has given invited lectures at more than 400 institutions. Dr. Sessler’s awards include a Fulbright Fellowship and the American Society of Anesthesiologists Excellence in Research prize.

Associate Director

Alparslan Turan, M.D.


Alparslan Turan, M.D. attended the University of GAZI Medical School and completed residency at Trakya Medical School. Dr. Turan currently is Professor of Anesthesiology at Lerner College of Medicine of Case Western University and Vice Chair of the Department of Outcomes Research at the Cleveland Clinic. He is on the editorial board of several journals and serves as the reviewer for more than 30 others. Dr. Turan’s grants total more than $8 million, and he has published more than 250 research papers. His main interests are perioperative outcomes, postoperative pain, regional anesthesia, and persistent surgical pain. An award for Clinical research has been dedicated to his name by Turkish Anesthesiology Society. He also has received multiple awards for his clinical research from various societies.

Major Site Directors

Donal Buggy, M.D.; Ireland


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Donal Buggy is Professor of Anaesthesiology & Perioperative Medicine and Consultant in Anaesthesiology at Mater University Hospital, University College Dublin. He was elected for a 2nd term as Council Member of the College of Anaesthesiology of Ireland, having served as Editorial Board Member of BJA 2009-21. He is currently Chair of the European Society of Anaesthesiology & Intensive Care (ESA-IC) Onco-Anaesthesiology Research Group, and Principal Investigator of the ESA-IC research network’s prospective observational study on diabetes, MOPED, which is currently enrolling patients. In June, he will be awarded the degree of Doctor of Science (DSc), the highest doctorate of National University of Ireland, for his career’s published work as clinician scientist on the influence of perioperative interventions on postoperative patient outcomes.

Barak Cohen, M.D.; Israel


Dr. Barak Cohen graduated from the Hebrew University of Jerusalem's medical school in 2003, and served as a medical officer in the IDF until 2015. He concomitantly completed his residency in the division of anesthesia, intensive care, and pain medicine in the Tel-Aviv Medical Center. During his service and residency, Dr. Cohen gained both academic and scientific experience. During his military service he directed the medical preparedness of the Israeli health system to non-conventional radiological disasters, both in the pre-hospital and the hospital environments. In 2019 he completed a 3-year clinical research fellowship in the Cleveland Clinic's Outcome Research Department, serving as the department’s chief research fellow. He currently serves as the vice chair and the director of clinical research in the division of anesthesia, intensive care, and pain medicine in the Tel-Aviv Medical Center, combining clinical work and the responsibility over clinical research in the largest anesthesia department in Israel. He is also a member of the research committee of the Israeli Society of Anesthesiologists, dedicated to promoting collaborative research in Israel. Additionally, he is a member of the monitoring and equipment subcommittee of the European Society of Anesthesiology and Intensive Care’s scientific committee, and a member of the Outcomes Research Consortium. Dr. Cohen’s main areas of interest include continuous postoperative monitoring, acute postoperative pain, and effects of intraoperative hyperoxia.

PJ Devereaux, M.D., Ph.D. Hamilton Canada


Dr. Devereaux obtained his MD from McMaster University. After medical school he completed a residency in internal medicine at the University of Calgary and a residency in cardiology at Dalhousie University. He then completed a PhD in Clinical Epidemiology at McMaster University. Dr. Devereaux is a cardiologist, perioperative care physician, and clinical epidemiologist. He is the Director of the Division of Perioperative Care at McMaster University. He is a Senior Scientist and the Scientific Leader of the Anesthesiology, Perioperative Medicine, and Surgical Research Group at the Population Health Research Institute. Dr. Devereaux is a full Professor in the Departments of Health Research Methods, Evidence, and Impact (HEI) and Medicine at McMaster University. He is the President of the Society of Perioperative Research and Care. Dr. Devereaux has published >390 peer reviewed papers and >85 book chapters, editorials, and commentaries. Dr. Devereaux has an h-index of 108 and 266,260 citations. He has given >1000 lectures and research presentations in 41 countries. Dr. Devereaux’s research program focuses on medical complications during and after surgery. Dr. Devereaux is supported by the McMaster University / Hamilton Health Sciences Chair in Perioperative Care. Dr. Devereaux holds a Tier 1 Canadian Research Chair in Perioperative Medicine.

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Yuguang (Gary) Huang, M.D. Beijing China


Brian Ilfeld, MD, MS


Professor, In Residence, University of California San Diego; medical school & residency at UC San Francisco; regional anesthesia fellowship & MS degree (Clinical Investigation) at the University of Florida; 95% time dedicated to clinical research; 180 PubMed-indexed articles & editorials (h-index 55); $25-million in Federal funding; current research: treatment of acute & chronic pain with continuous peripheral nerve blocks, percutaneous cryoneurolysis, and various forms of neuromodulation.

Ashish K. Khanna MD, FCCP, FCCM, FASA North Carolina


Dr. Ashish K Khanna is an associate professor of anesthesiology and vice-chair for research with the department of anesthesiology, section on critical care medicine at the Wake Forest School of Medicine in Winston-Salem, NC. He is also a member of the Wake Center for Biomedical Informatics, the Center for Healthcare Innovation, and the Wake Forest Hypertension and Vascular Research Cardiovascular Science Center. He is also director of the Perioperative Outcomes and Informatics Collaborative (POIC), a large perioperative outcomes collaborative research program. His research interests include prediction of post-operative respiratory and cardiac events on the regular nursing floor, use of large datasets for perioperative outcomes research, effects of hypotension in critically ill patients and use of novel vasopressors in shock states in the ICU. Dr. Khanna has published more than a 120 full papers. Dr. Khanna led the Angiotensin II in High Output Shock trial which resulted in FDA approval for the novel vasopressor.

Ngai Liu, M.D., Ph.D. France


Ngai Liu, MD, PhD is Associate Professor of Anesthesia and Director of Research (Hôpital Foch, Suresnes and CHR Orléans, France). His research interests are intravenous anesthesia, pharmacology, brain monitoring and closed-loop controllers. He has extensive clinical experience to cardiothoracic anesthesia, neurosurgery and regional anesthesia. He is cofounded of MedSteer a biomedical company.

Colin Royse, MD


Dr. Royse is a Professor of Anesthesiology at the University of Melbourne, and a cardiothoracic anesthesiologist at the Royal Melbourne Hospital. His research interests include cardiac surgery outcomes, postoperative quality of recovery, echocardiography and clinical ultrasound. He is a founder of the Postoperative Quality of Recovery Scale (PostopQRS). He has published over 175 peer reviewed papers. He has a strong educational interest, specializing in eLearning, and is currently the Director of Custom and Professional Education for the Faculty of Medicine, Dentistry and Health Sciences at the University of Melbourne. He is a senior section editor for Anaesthesia and Analgesia.

Bernd Saugel, MD


Bernd Saugel is Professor of Anesthesiology and Vice Chair of the Department of Anesthesiology in the Center of Anesthesiology and Intensive Care Medicine at the University Medical Center Hamburg-Eppendorf (Hamburg, Germany). He is a board-certified specialist in anesthesiology, intensive care medicine, and internal medicine and holds a European Diploma in Intensive Care Medicine. His main research area is the hemodynamic management of high-risk patients having surgery and of critically ill patients. He especially focuses on concepts of "personalized hemodynamic management" to improve patient-centered outcomes in perioperative and intensive care medicine. Prof. Saugel has published numerous original articles and didactic reviews in peer-reviewed journals.He is Editor of the British Journal of Anaesthesia and Associate Editor (Cardiovascular) of the Journal of Clinical Monitoring and Computing.

Peter Szmuk, MD; Dallas, USA


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Professor of Anesthesiology in the Department of Anesthesiology at University of Texas Southwestern in Dallas, TX and Director of Pediatric Clinical Research in the Division of Pediatric Anesthesia at Children’s Medical Center, Dallas, TX. More than 140 full papers. He participates in large collaborative research studies, such as the GAS study, in which 24 centers from North America, Europe, Australia and New Zeeland worked together in the only prospective randomized trial dedicated to the role of general anesthetics in neurodevelopment of young patients. Part of this study was NIH sponsored and resulted in multiple publications, including two in 2016 and 2019 in Lancet. He was the leader of the follow-up pilot study, the TREX study, with most of the same group. Dr. Szmuk is a founder of two multicenter registry studies: The Pediatric Difficult Intubation Registry (PDiR) and the Pediatric Craniofacial Collaborative Group (PCCG), each of which has improved our understanding and management.

Thomas Volk, MD; Germany


Thomas Volk, M.D. attended the University of Essen, Germany and completed his residency at Charité University Medicine, Berlin, Germany. Thomas Volk is a full Professor of Anesthesiology at the University of Saarland, Germany, and Head of the Department of Anesthesiology, Intensive Care and Pain Medicine in Homburg, Germany. He is member of several medical societies, the outcomes research consortium and has published more than 230 research papers. His main interests are related to breath analysis and regional anesthesia. Thomas Volk currently is president for the European Society of Regional Anesthesia.

Prof. Dong-Xin Wang; China


Professor Dong-Xin Wang is the chair of Department of Anesthesiology and Critical Care Medicine of Peking University First Hospital and currently supervises more than a dozen graduate students. Prof. Wang is vice president of the Chinese Society of Cardiothoracic and Vascular Anesthesia, executive member of the council of Chinese Research Hospital Association Branch of Anesthesiology, chairman of the Chinese Society of Anesthesiology branch of sleep medicine, and vice-president of Beijing Society of Anesthesiology. Prof. Wang’s scientific research is directed towards prevention of perioperative organ injury and complications, and measures that might improve long-term outcomes after surgery. He has published more than 200 full papers in domestic and foreign journals including the Lancet, Annuals of Surgery, Anesthesiology, and British Journal of Anaesthesia.
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