United States Research Team

  Randall Matthew Chesnut, MD, FCCM, FACS
University of Washington Harborview Medical Center
Principal Investigator
Dr. Chesnut, based at Harborview Medical Center, is a UW professor with appointments in two departments: Neurological Surgery, and Orthopaedics and Sports Medicine. He has particular expertise in surgery and critical care for traumatic brain injury, spinal cord injuries, failed back surgery, and adult spondylolisthesis, as well as sports-related spine and brain injuries.

He is conducting research to improve care for people with traumatic brain and spine injuries, and currently has funding from the National Institutes of Health for outcome studies in brain injury and trauma care systems in Latin America. He is also a leader in writing evidence-based practice guidelines for traumatic brain injury and spine surgery.
  Jason Barber MS,
University of Washington Harborview Medical Center
Mr. Barber is the database manager and data analyst for the project. He is responsible for the design and maintenance of the computerized database. He develops secure computerized randomization methods used to verify eligibility and for treatment assignment and the Access database corresponding to the case report forms and implement the data quality checks developed by Ms. Machamer. He is responsible for writing and validating the programs used to prepare the data and safety monitoring reports and the data analyses for presentations and publications. He works with Dr. Temkin in analyzing the study data for publication of manuscripts.
  Juanita Celix MD
University of Washington Harborview Medical Center
  Kelley Chaddock BA
University of Washington Harborview Medical Center
Ms. Chaddock is the research project coordinator and has 3 years experience working as a clinical study coordinator in recruitment and outcomes assessment. She works closely with Dr. Chesnut to ensure the smooth operation of the entire program, and with Mr. Pridgeon and Dr. Rondina on overall administration. Ms. Chaddock has been a member of the UW TBI study team for over 4 years.
  Mariana Cherner PhD
University California San Diego
Dr Cherner is in charge of developing and implementing neuropsych outcomes at all participating sites.  She has worked for 4 years with the current NIH NINDS R01 team on implementing the RCT and, as an investigator, is involved with publications and overall study management.
  Sureyya Dikmen PhD
University of Washington Harborview Medical Center
As the study neuropsychologist, Dr. Dikmen is responsible for the patient post-discharge assessments and oversees content and quality of the outcome and neuropsychological data collection.  She leads the training and certification of examiners.  Training for examiners involves role playing, observation of interviews carried out by experienced raters, supervised administration, and review of scoring. Examiners are required to pass a certification test prior to performing study evaluations.
  Terence Hendrix
University California San Diego
Mr. Hendrix is the site outcomes coordinator for the RCT  and has worked with the current team of investigators and outcomes examiners for several years. 
  Joan Machamer MA
University of Washington Harborview Medical Center
Ms. Machamer works both with study documentation and with study personnel to ensure data are of high quality. With input from study investigators, she developed the Manual of Procedures for the study, case report forms, and the data dictionary.  She has coordinated development of range checks and within- and across-form consistency checks.  She reviews all functional and neuropsychological assessments for adherence to the assessment procedures.  In addition, she works with the individual data collectors to correct errors or verify unusual values.
Jim Pridgeon, MHA
University of Washington Harborview Medical Center
Mr Pridgeon is involved in development and editing of research grants, publications and web content. Also, he is involved with marketing and contributes to NIH sponsored research capacity-building efforts in Latin America by supporting grant writing and publications with the Latin American Brain Injury Consortium.

He has 30 years experience in research administration and has helped raise over $100 million for neuroscience research.
  Nancy R. Temkin, PhD
University of Washington Harborview Medical Center
Dr. Temkin's research interests are in Biostatistics. Her research focuses on outcome assessments for a variety of treatments for neurosurgical diseases, particularly traumatic brain injury (TBI). She was the PI on the seminal studies of the value of prophylactic anticonvulsants in TBI management. She has multiple awards from the NIH and DOD.