Physicians and Staff

The UNC Hemophilia and Thrombosis Center's dedicated team of hematologists, nurse educators, social worker, pharmacist, research coordinators and support staff provides a range of services from diagnostic evaluation and treatment, to education, care coordination and research.



Adult Hematology


Nigel Key, MB ChB FRCP, Harold Roberts Distinguished Professor, Hematology; Director, UNC Hemophilia and Thrombosis Center


Raj Kasthuri

Raj Kasthuri, MB BS Clinical Associate Professor, Hematology



Alice Ma, MD, Professor, Hematology

Alice D. Ma is a Professor of Medicine and the fellowship director in the Division of Hematology-Oncology at the University of North Carolina School of Medicine in Chapel Hill and is a member of the Harold R. Roberts Comprehensive Hemophilia Treatment Center. Dr Ma received her medical degree from the University of Michigan Medical School in Ann Arbor. She then completed an internship and residency in medicine and a fellowship in hematology-oncology at the Hospital of the University of Pennsylvania in Philadelphia.  Dr. Ma is a dedicated physician, researcher, teacher, and leader in the field of hematology and coagulation. She has received numerous teaching awards and authored textbooks and scientific studies, including studies on acquired hemophilia.  Her clinical interests are in bleeding disorders, women’s health, and hematology education.

Stephan Moll, M.D.

Stephan Moll, MD, Professor, Hematology

Dr. Moll is a hematologist with the Division of Hematology-Oncology and has a special interest in blood clots (thrombosis) and blood thinners (anticoagulation). He received his medical degree from Freiburg University, Germany, and completed an internship and residency in medicine and a fellowship in hematology-Oncology at Duke University Medical Center in Durham N.C., and a one-year clinical coagulation fellowship at UNC in Chapel Hill. Dr. Moll has been a faculty member at the UNC since 1999. His research interests include clinical trials on new anticoagulants, better use of established anticoagulants, antiphospholipid antibody syndrome and postthrombotic syndrome. He takes a special interest in clinical-medical education of patients, the public, and health care professionals. He is a co-founder of UNC’s education program for patients with blood clots Clot Connect (, and a co-founder of the National Blood Clot Alliance (

Micah Mooberry photo 

Micah Mooberry, MD, Clinical Assistant Professor, Hematology

To learn more about Dr. Mooberry's research interests, please use the following link:

Pediatric Hematology

Yasmina Abajas

Yasmina Abajas, M.D., Clinical Assistant Professor, Pediatric Hematology/Oncology

Yasmina Abajas, M.D., joined the UNC Department of Pediatrics in July 2016 as the newest faculty member in the Division of Pediatric Hematology/Oncology.  Dr. Abajas, a native of Miami, FL, received her undergraduate and medical degrees and completed her pediatric residency at the University of Miami.  She then went on to complete a pediatric hematology oncology fellowship at the University of North Carolina.  Dr. Abajas’ primary clinical and research interests are in hemostasis and thrombosis.


Brent Weston 

Brent Weston, MD, Associate Professor, Pediatric Hematology/Oncology

Board certified in pediatrics and pediatric hematology/oncology, Dr. Weston cares for patients with diverse and rare bleeding and clotting disorders. He also maintains an active oncology practice.  His patients have access to the latest pediatric hematology and oncology multi-institutional protocols. Dr. Weston received his MD at Duke University, did his pediatric residency at UNC-Chapel Hill, and his fellowship and post-doc at the University of Michigan. He has been an attending physician at UNC-Chapel Hill since 1992 and has mentored many physicians in both research and clinical settings.


Hemophilia Program (

Fran Davis

Fran Davis, RN, BSN, CRNI, Program Manager

Fran joined the staff of the UNC Hemophilia and Thrombosis Center in February 2017 with 33 years of professional nursing experience including clinical nursing with both pediatric and adult patients, home infusion nursing, home infusion discharge coordinator and care management. She has been a nurse at UNC Health Care since 2000. Fran received her Bachelor of Science in Nursing from East Carolina University in Greenville, NC. She received her Certified Registered Nurse Infusion (CRNI) certification in March 2015.

Tracy Griles

Tracy Griles, Administrative Support Associate


Brenda Nielsen May 2015

Brenda Nielsen, RN, MSN, Nurse Consultant

Brenda has been a nurse consultant at the UNC Hemophilia Center since 1992.  She received both her Bachelors degree and her Masters degree in nursing at the University of North Carolina at Chapel Hill. She especially enjoys getting to know and working with children, families, and adults with bleeding disorders and watching them develop into independent hemophilia or von Willebrand experts. As an adjunct assistant instructor at the School of Nursing at UNC-Chapel Hill, she serves as a resource for nursing students and faculty about bleeding disorders.  She is a member of the Medical Board of Camp Carefree in Stokesdale, NC and is an advocate for providing a camp experience for all kids. 


Leunora Ward, RN

Leunora Ward, RN, Nurse Consultant

Leunora has been a nurse consultant at the UNC Hemophilia Treatment Center since 2012.  She received her Bachelors of Science in Nursing from Winston-Salem State University and has over 16 years of clinical nursing experience. She especially enjoys teaching adults, children and families self-venipuncture for home factor infusions with the goal of nurturing independence and health promotion within the hemophilia population.  

Kristy Lee 6-2015

Kristy Lee, MS, CGC, Genetic Counselor

Kristy Lee is a Certified Genetic Counselor and Associate Professor in the Department of Genetics at the University of North Carolina at Chapel Hill.  Ms. Lee received her undergraduate degree from North Carolina State University and a Masters degree in Genetic Counseling from the University of North Carolina at Greensboro.  She specializes in genetic counseling for patients and their families with bleeding disorders and the visually impaired.  Her research interests involve examining the effectiveness and implementation of whole genome/exome analyzes and novel gene discovery for coagulopathies and retinal dystrophies. 


Cathy L. Howes, RPT, Physical Therapist


Jennifer Newman

Jennifer Newman, MSPT, Physical Therapist

Jennifer Newman is a physical therapist involved with the UNC Treatment Center since 2011.  Jennifer received her undergraduate and masters degree in physical therapy from Ithaca College in 2003.   Her involvement began in the bleeding disorders community in 2010 at the Oregon Hemophilia Treatment Center.  Jennifer serves on the Chair of the Physical Therapy Working Group for the National Hemophilia Foundation and is a member of the MASAC Pain Initiative.   She specializes in pediatric physical therapy with special interest in aquatic physical therapy. She received her Certificate in Aquatic Physical Therapy Clinical Competency (CAPTCC) in 2017. 


Steven Humes, MM, MPH, Regional Coordinator, Region IV-North Hemophilia Treatment Center Network

Steven Humes is the Regional Coordinator for the Region IV-North Hemophilia Treatment Center Network based at UNC-Chapel Hill.  He has worked in public health for over 20 years, with experience in HIV prevention at the American Red Cross in Greater New York and at Gay Men’s Health Crisis in New York. He also oversaw educational and research programs during a ten-year stint at the National Hemophilia Foundation in New York. He holds an MPH with a concentration in Community Health Education.

Virginie Sirianna

Virginie Sirianna, Data Coordinator


Research and Clinical Trials

Robin Kellerman

Robin Kellerman, RN, BSN, MSS, Nurse Consultant

Robin Kellerman has been part of our clinical research team since 2008. She received her Bachelor of Science in Nursing from Clemson University, and holds a Master of Sport Science degree in Fitness Management. She has nearly 30 years of professional experience including clinical nursing, project management and research coordination covering a diverse range of medical conditions.  Robin focuses her work efforts on all aspects of our clinical research program including bleeding and clotting disorders as well as our translational medicine projects.

Marcus A. Layer

Marcus A. Layer, Clinical Research Coordinator

Marcus joined the Hemostasis and Thrombosis Program at the beginning of 2016. He received his Bachelor of Arts in Health Policy from the University of North Carolina at Chapel Hill and is currently pursuing a Masters in Public Health (Applied Epidemiology) remotely from Emory University. As a research coordinator, Marcus helps the clinical research team manage clinical trials that focus on patients with bleeding or clotting disorders.


Brett Phillips

Brett Phillips, MA, Clinical Research Coordinator

Brett joined the clinical research team in the Hemostasis and Thrombosis Program at the start of 2016. He received his Bachelor of Science in Exercise Physiology from West Virginia University and holds a Masters in Exercise Physiology from the University of North Carolina – Chapel Hill. Brett has transitioned his focus from studying the impact of exercise on cancer outcomes to studying bleeding and clotting disorders in the cancer population as well as the coordination of other translational medicine projects within the Hemostasis and Thrombosis Program.


Christine Hill

Christine Hill, University Program Specialist

Christine Hill joined the Hemostasis and Thrombosis Program at UNC-CH in 2007.  Ms. Hill also works with the UNC HTC Pharmacy.  She collaborates with the Program Manager to develop and expand the Pharmacy Program.  Her responsibilities within the pharmacy include assuring compliance with policies and procedure, development of patient education marketing materials, and accreditation management.   She manages several programs and projects associated with the Hemostasis and Thrombosis Program along with the Pharmacy Program.