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(918) 645-5400


  • HOME
  • ABOUT US
  • MEET OUR STAFF
  • STUDIES
  • APPOINTMENTS
  • CONTACT

MEET OUR STAFF

Our staff is dedicated to improving your health & well-being. Each study has a lead coordinator that not only guides you through your visits but checks in regularly outside of the office as well. We take pride in these strong relationships that we've formed with our study participants.

Sarah Land, DO - Director/Investigator

  • Medical School: Oklahoma State University Center for Health Sciences College of Osteopathic Medicine
  • Residency in Psychiatry: University of Oklahoma College of Medicine
  • Board Certified: American Board of Psychiatry and Neurology
  • Board Certified: American Osteopathic Board of Neurology and Psychiatry
  • Board Certified: National Board of Physicians and Surgeons
  • Member: Obesity Medicine Association
  • Member: American Board of Obesity Medicine
  • Adjunct Professor, Oklahoma State University Center for Health Sciences
  • Founder of Central States Research LLC & Mind Spa LLC

Michael Karathanos, MD - Investigator

  • Medical School: National University School of Medicine, Athens, Greece
  • Residency in Neurology
  • Board Certified 
  • 25+ years of clinical research with 200+ CNS related trials
  • 25+ years of clinical experience with inpatient and outpatient Neurology
  • 25+ years as a professor and preceptor, University of Oklahoma College of Medicine

Kaitlin B. Cores, MD - Investigator

  • Medical School: University of Oklahoma College of Medicine
  • Residency in Psychiatry: University of Oklahoma College of Medicine
  • Board Certified: American Board of Psychiatry and Neurology
  • Adjunct Professor, Oklahoma State University Center for Health Sciences

Grace Janes, BA

Christy Lisenbee, BS, CCRC

Christy Lisenbee, BS, CCRC

  • Business Development Manager
  • Bachelor of Arts in Strategic Communications from Oklahoma State University
  • Heavy focus on growth and recruitment
  • Regulatory manager with certification in Good Clinical Practice

Christy Lisenbee, BS, CCRC

Christy Lisenbee, BS, CCRC

Christy Lisenbee, BS, CCRC

  • Clinical Research Coordinator
  • 13+ years clinical research experience
  •  ACRP Certified Clinical Research Coordinator, trained in Good Clinical Practices and Human Subject Assurance, CITI and NIH, IATA and CPR certifications. 
  • Bachelor of Science and Biology, Chemistry Minor from Northeastern State University

Sadie Fuller, MS

Christy Lisenbee, BS, CCRC

Carmen Toegel, LPN

  • Certified Rater for 50+ batteries
  • Bachelor of Fine Arts, Texas Christian University, Speech Communication
  • Master of Science, Texas Christian University, Communication in Human Relations, Emphasis in Organizational Communications
  • 25+ Years of research experience 

Carmen Toegel, LPN

Carmen Toegel, LPN

Carmen Toegel, LPN

  • Clinical Research Coordinator 
  • Licensed Practical Nurse
  • Specializes in adult internal medicine, all aspects of phase II-IV trials
  • Therapeutic area included: hypertension, dyspepsia, metabolic syndrome, cardiac, lipid disorders, type II diabetes, irritable bowel syndrome
  • 25+ years of clinical research experience 

Duwane Tillery, MA

Carmen Toegel, LPN

Duwane Tillery, MA

  • Clinical Research Coordinator
  • 30+ years of clinical research experience 
  • Associates degree in business management and medical nursing
  • Certifications for IATA, NH, CITI, BLS, PALS

Angie Hensley, BS

Carmen Toegel, LPN

Duwane Tillery, MA

  • Bachelor of Science in Business Administration, emphasis on Marketing
  • CTMS Online Manager
  • Invoicing and Billing 
  • Budgets and Contracts
  • Provide internal reviews & feedback for CSR growth

Michaela Khoussine, MPH, CPH

Michaela Khoussine, MPH, CPH

Michaela Khoussine, MPH, CPH

  • Clinical Research Coordinator
  • Bachelor of Science, University of Oklahoma, Health & Exercise Science
  • Master of Public Health in Epidemiology, University of Oklahoma Health Sciences Center
  • Certified in Public Health, IATA, Good Clinical Practices, and Clinical Dementia Ratings 

Shelby Ford, BS, MA

Michaela Khoussine, MPH, CPH

Michaela Khoussine, MPH, CPH

  • Clinical Research Coordinator & Medical Assistant
  • Bachelor of Science, University of Oklahoma, Psychology
  • Certified in IATA, Good Clinical Practices, and Clinical Dementia Ratings

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