INVESTIGATORS

Diana Kerwin, MD, CPI
PRINCIPAL INVESTIGATOR

Alka Khera, MD
NEUROLOGIST, INVESTIGATOR
Jennifer Vo, ACNP-BC
CLINIC DIRECTOR, INVESTIGATOR

Subhan Tabba, MD, MBA
INTERNIST, INVESTIGATOR
Meet Dr. Tabba!
Dr. Subhan Tabba is an Academic Hospitalist at Texas Health Presbyterian Dallas Hospital and has joined Kerwin Medical Center to further his work in Alzheimer’s Disease and Related Dementias (ADRD) research. His focus is not only on finding a cure for these conditions but also on providing more resources for the care partners of dementia patients.
Dr. Tabba earned his Medical Doctorate (MD) from The University of Texas Health Science Center at McGovern Medical School and a Master of Business Administration (MBA) from the University of Houston. He also holds a Bachelor of Science in Cell and Molecular Biology and a Bachelor of Arts in Psychology from The University of Texas at Austin.
A first-generation Pakistani-American, Dr. Tabba is deeply committed to advancing public health and healthcare for marginalized communities. His leadership and advocacy have reshaped policies at local, state, and national levels since 2018. His work has earned him several prestigious accolades, including the National Minority Quality Forum’s 40 Under 40, the Mark Feldman Academic Excellence Award, the Texas American College of Physicians Early Career Physician Award, and the University of Houston Alumni Association Early Achievement Award.
At Kerwin Medical Center, Dr. Tabba continues his mission to drive meaningful progress in dementia research, offering hope to patients and their families. When not working, he enjoys spending time with loved ones, traveling, and playing pickleball.
COGNITIVE RESEARCH

Irmaris Ríos-Vázquez, PhD
COGNITIVE RESEARCH MANAGER,
NEUROPSYCHOLOGIST

Jim Harris, PhD
NEUROPSYCHOLOGIST

Tiffini Hansen
PSYCHOMETRIC RATER
PHARMACY

Blake Edwards, MPH, CPhT
PHARMACY AND LAB MANAGER

Caitlin Keefe, PharmD
RESEARCH PHARMACIST

Aaliyah Shuja, CPhT
ASSISTANT PHARMACY MANAGER
Meet Aaliyah!
Aaliyah Shuja has been with Kerwin Medical Center since 2024, starting as an Assistant Pharmacy Manager. She has extensive experience in pharmaceutical care, having previously worked as a Lead Pharmacy Technician at ProHealthcare, as well as roles at Children’s Health Hospital, Texas Oncology, Parkland Hospital, and THR Presbyterian Hospital. With years of experience in both hospital and retail pharmacy settings, Aaliyah is well-versed in patient care, medication management, and healthcare operations.
Aaliyah holds a Master of Science and a Bachelor of Science in Psychology from Capella University. She is currently pursuing a Master of Arts in Professional Counseling at Texas Wesleyan University. Her academic background in psychology, combined with her expertise in pharmacy, allows her to take a patient-centered approach to healthcare. She is a Certified and Registered Pharmacy Technician, licensed in the State of Texas and at the national level, with certifications in Sterile Pharmaceutical Compounding, Health Informatics & Information Technology, and Basic Life Support (CPR & AED). Her dedication to professional excellence is further reflected in her lifetime membership with PSI CHI: The International Honor Society in Psychology and her distinction as a 4.0 Master’s Graduate Honor Roll Student.
Aaliyah is passionate about patient advocacy and healthcare accessibility, striving to create a compassionate and supportive environment for patients. She values the intersection of pharmacy, psychology, and counseling in improving overall patient well-being.
A Dallas native, Aaliyah enjoys road trips, retail therapy, swimming, art, and staying active in any way possible. She believes in lifelong learning and is always seeking new ways to contribute to the evolving field of healthcare.
OPERATIONS
Taylor Harris, MBA
DIRECTOR OF OPERATIONS
Maddie Liggett, MPH
PRACTICE MANAGER

Teri Youngdale
COMMUNITY OUTREACH COORDINATOR
Meet Teri!
REQUEST A CALL FROM TERITeri spent most of her career in the radio and AV/IT industries nationwide. When the Covid shutdown began in 2020, Teri was drawn to support her community in an independent pharmacy for four years. She received her Bachelor of Fine Arts in Radio/TV/Film from Sam Houston State University.
Teri came to Kerwin Medical Center as a Study Partner for her mom, and continues to support her mother in the ongoing study. She is happy to share her experience and help you overcome any challenges you are experiencing as you and your family consider participating in a clinical trial. As the Community Outreach Coordinator at Kerwin Medical Center, Teri creates and manages Kerwin’s Social Media content and coordinates Kerwin Medical Center’s events and community outreach. She is available to speak at your event and work with your patients or residents.
Teri resides in McKinney and continues to support her mom as a co-caregiver. In her free time, Teri enjoys spending time with family, friends, bees, and pets.

Gabi Mireles
FRONT OFFICE COORDINATOR - OAK CLIFF
Meet Gabi!
Gabi joined the KMC team in October of 2024. Here's what she has to say:
I genuinely enjoy being part of a team that makes a difference in people’s lives. With years of experience working with the older community, I’ve developed a strong passion for providing support and creating meaningful connections. One of my favorite aspects of my role is the opportunity to interact with patients face-to-face, ensuring they feel comfortable and cared for.
As a natural people person, I thrive on building relationships and making every individual feel heard and valued. Whether I’m assisting patients or collaborating with colleagues, I love fostering a positive, welcoming environment. For me, it’s all about making a real impact and improving the patient experience every step of the way.

Amber Beard
FRONT OFFICE COORDINATOR - PRESBYTERIAN HOSPITAL DALLAS
Meet Amber!
Stay tuned to meet Amber!
QUALITY ASSURANCE

Heather Conover, RN
REGULATORY COMPLIANCE COORDINATOR

Adra Blaine, CCRA
QUALITY ASSURANCE COORDINATOR

Laurel Nowden, MBA, CCRP
QUALITY ASSURANCE ASSOCIATE
Meet Laurel!
Stay tuned to meet Laurel!
CLINICAL RESEARCH
Jennifer Juarez, CCRC
SENIOR CLINICAL RESEARCH COORDINATOR,
PROJECT MANAGER
Jordan Caldwell, CCRC
CLINICAL RESEARCH COORDINATOR,
COORDINATOR MANAGER
Karen Aleman, CCRC
CLINICAL RESEARCH COORDINATOR
Megha Chadha, MS, CCRC
CLINICAL RESEARCH COORDINATOR

Monica Olivarez
CLINICAL RESEARCH COORDINATOR
Julias Flores, RN, BSN
CLINICAL RESEARCH NURSE

Kayla Brown, MS
RESEARCH ASSISTANT
Meet Kayla!
Stay tuned to meet Kayla!

Rani Nune
RESEARCH ASSISTANT
Meet Rani!
Stay tuned to meet Rani!