About Us

  1. Home
  2. /
  3. About Us

Guardian Angel Research Center

Guardian Angel Research Center is a leading clinical research organization. Our team comprises of skilled healthcare professionals who are committed to delivering top-notch medical research services. We strive to provide our patients with the highest quality of care and expertise.

Our team comprises Board-Certified Physicians, research coordinators, phlebotomists, registered nurses, medical assistants, and office managers, who work together to ensure exceptional patient care.

Located just 5 miles from the Tampa International Airport, our facility is easily accessible via major roadways and public transportation, and transportation assistance is also available for your convenience. We are conveniently located in close proximity to St. Joseph Hospital and Florida Hospital Carrollwood, providing you with access to the best medical care.

About Guardian Angel Research Center
Guardian Angel Icon

What We Do

Paid Clinical Trials in Tampa

At our research center, we conduct clinical trials to explore innovative solutions. Our focus is on developing new treatments and therapies that improve patient outcomes. Our dedicated team works tirelessly to ensure that our clinical trials are of the highest quality.

In addition, our research center focuses on advancing medicine through cutting-edge studies. Our medical professionals and researchers are committed to improving patient outcomes through new treatments and discoveries. By conducting research in a clinical setting, we bring new advancements to our patients quickly.

At Guardian Angel Research Center, we are committed to delivering exceptional medical research services to our patients. Our studies are conducted by Board-Certified Physicians and Certified Investigators, with the support of a highly skilled and experienced clinical team.

Our Medical Team

Meet our team of healthcare professionals

  • Sadaf Bazargan, MD

    Dr. Sadaf Bazargan, MD

    Neurology - Pain Medicine

    Dr. Bazargan graduated from the Universitat Autonoma De Barcelona Facultat De Medicina in 1990 and has since been providing medical care as a healthcare provider. She specializes in Neurology and Pain Medicine. With over 30 years of experience in medicine and more than 10 years dedicated to research.

    Mario Hernandez, MD

    Dr. Mario Hernandez, MD

    Family Medicine

    Dr. Mario F. Hernandez is a board-certified family medicine physician with a Bachelor of Science from Central Michigan and a Doctor of Medicine from Universidad Autonoma de Guadalajara. He completed a residency at University of Kentucky and received awards. He is a member of the Florida Medical Association and the American Academy of Family Physicians. Dr. Hernandez dedicated many years to the research industry as a Principal Investigator for more than 6 years.

    Dr Luis Lopez, MD

    Dr. Luis Lopez, MD


    Dr. Lopez graduated from Ponce School of Medicine and completed residencies in Internal Medicine and Gastroenterology. Known for exceptional patient care. Dr. Lopez's extensive medical background and commitment to patient well-being make him a trusted provider in the community. Dr. Lopez has been a Principal Investigator for more than 8 years.

  • Gisela G. Leyva, MD

    Dr. Gisela G. Leyva, MD

    Family Medicine - Psychiatry

    Dr. Leyva is a family medicine and psychiatry specialist with a degree from Universidad Autonoma De Nuevo Leon and Facultad De Medicina. She practices in St. Petersburg, FL and two other locations and is affiliated with All Children's Hospital. She is fluent in Spanish and English.

    Liuber Carballar, MD

    Dr. Liuber Carballar, MD

    Internal Medicine

    Dr. Liuber Carballar Alberteries, MD is a highly skilled healthcare provider with over 22 years of experience. He graduated from Universidad De Ciencias Medicas De La Habana in 2001 and specializes in Internal Medicine. Dr. Carballar has been involved in clinical trials since residency and throughout his career in many therapeutic areas.

Find a Clinical Research Study for You

Help advance medicine, discover new treatments for your condition, and make a positive impact on the future health of your family and community.

Available Clinical Studies

The following studies are currently recruiting participants. Contact us today for detailed information.

Alzheimer Related With Psychosis

Phase: Phase 3  /  Start Date: April 2024

Approximately 30% of patients with AD experience symptoms of psychosis, commonly consisting of hallucinations and delusions. These symptoms may be frequent and severe, and may recur over time.

Enrollment Open


Phase: Phase 3  /  Start Date: Febr 2024
Enrollment Closed

Colon Cancer Screening

Phase: Phase 3  /  Start Date: Sept 2022
Enrollment Closed

Ulcerative Colitis

Phase: Phase 3  /  Start Date: Febr 2024
Enrollment Open

Gastroesophageal Reflux

Phase: Phase 3  /  Start Date: April 2024
Enrollment Open
Studies Conducted
Patients Enrolled
Retention Rate
Patient Satisfaction
Guardian Angel New Logo White

At Guardian Angel Research Center, we are dedicated to providing patients with the best medical research services possible. Our clinic is dedicated to conducting and closely monitoring Clinical Research in an effort to improve disease prevention, diagnosis, and treatment methods.

Copyright © 2024 Guardian Angel Research Center, Inc. - All Rights Reserved.
Website Design By: True Webmaster
Please fill out the following form