Meet Our Team

We provide care for infants, children and teens with a wide variety of pediatric endocrinological problems.

Diabetes Providers

Jose Atilio Canas, M.D.

Jose Atilio Canas, M.D. Endocrinology

Dr. Canas is director of endocrinology at Johns Hopkins All Children’s Hospital. He joined the hospital staff in 2018. He was previously associate attending at Wolfson Children's Hospital, and served as medical director of the Nemours Pediatric Cardio Metabolic and Bariatric Center in Jacksonville, Florida. His research interests include cardiovascular complications of diabetes and the use of carotenoids for obesity prevention. Dr. Canas earned his medical degree from Universidad Nacional Pedro Henriquez Urena in the Dominican Republic. He completed his pediatrics residency and served as chief resident at Nassau County Medical Center. There he also completed a clinical and research fellowship in pediatric endocrinology and metabolism. Dr. Canas speaks Spanish.

Jahanara Begum-Hasan, MD, PhD Endocrinology

Dr. Begum-Hasan specializes in pediatric endocrinology in the Department of Medicine. She joined Johns Hopkins All Children’s in December 2016 after seven years as a clinical associate professor in the Department of Pediatrics at the Carilion Clinic and Virginia Tech Carilion School of Medicine in Roanoke, Virginia. Previously, Dr. Begum-Hasan was a clinical assistant professor in the Department of Pediatrics at Queen’s University in Kingston, Ontario. Dr. Begum-Hasan earned her medical degree from the Dhaka Medical College in Bangladesh.
View Jahanara’s Bio

Mary Gan, M.D. Endocrinology

Dr. Gan specializes in pediatric endocrinology for Johns Hopkins All Children’s Hospital. She generally works at the Outpatient Care Brandon and Tampa locations and through the hospital’s relationships with AdventHealth Tampa and Brandon Regional Hospital. Previously, she worked at the Cape Fear Valley Diabetes and Endocrine Center in Fayetteville, N. C.
View Mary’s Bio

Suzanne Jackman, M.D. Endocrinology

Dr. Jackman specializes in pediatric endocrinology. She received her medical degree from the University of South Florida College of Medicine, where she received the Lewis A. Barness Award from the Department of Pediatrics and the Watson Clinic Foundation Award for Medical Research. She remained at USF for her pediatric residency, earning the Intern of the Year Award, followed by a fellowship in pediatric endocrinology.
View Suzanne’s Bio

Allen Root, M.D. Endocrinology

Dr. Root is a pediatric endocrinologist. A graduate of Harvard Medical School, Dr. Root completed his internship at Strong Memorial Hospital, Rochester, NY and his pediatric residency at University of Pennsylvania, followed by a fellowship in pediatric endocrinology at Children's Hospital of Philadelphia, University of Pennsylvania. After serving on the medical faculty of the University of Pennsylvania and Temple University, Dr. Root joined the University of South Florida College of Medicine in 1973, serving as professor of pediatrics, associate and vice-chair of the Department of Pediatrics, and director of the pediatric residency program.
View Allen’s Bio

Kaitlin Dorman

Kaitlin Dorman MS, RD, LD/N

Kaitlin is a registered dietitian nutritionist who joined the endocrinology team at Johns Hopkins All Children’s Hospital in 2017. She was previously at UF Health in Gainesville, where she also completed her internship. She earned her Master of Science degree in nutrition from the University of Florida in Gainesville.

Kevin Lewis


Kevin is a pediatric nurse practitioner specializing in endocrinology at Johns Hopkins All Children’s Hospital. Previously, he was at the Charleston Area Medical Center in Charleston, West Virginia, where he most recently was director of clinical diabetes. He also has experience at the Akron Children's Hospital in Ohio, the University of Maryland Medical Center in Baltimore, the Walter Reed Army Medical Center in Washington and Shady Grove Adventist Hospital in Rockville, Maryland. He received his Master of Nursing/Child Health and his Doctor of Nursing Practice from West Virginia University. Dr. Lewis is a certified diabetes educator.

Megan Sanborn

Megan Sanborn MSN, APRN, CPNP-PC

Megan is a pediatric nurse practitioner in endocrinology at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2018. Previously, she was at St. Joseph’s Children’s Hospital in Tampa, Florida, and Golisano Children’s Hospital of Southwest Florida in Fort Myers. She received her master of pediatric nursing from the University of South Florida in Tampa.

Jane Vittitoe

Jane Vittitoe LCSW

 Ana Warren


Ana is a Pediatric Nurse Practitioner in Johns Hopkins All Children Hospital’s Diabetes and Endocrinology department. She is certified as a diabetes educator and in advanced diabetes management. In addition, she is certified in nursing professional development. She is also certified as an insulin pump and continuous glucose monitor trainer. Ana is a member of the National Association of Pediatric Nurse Practitioners and American Association of American Diabetes Educators. Ana received her nursing degree from Jackson Memorial School of Nursing 1984, BS in Psychology from University of Florida 1985, Masters of Science in Nursing from University of South Florida. Ana was born in Cuba and grew up in Miami, Florida. She is Bilingual in Spanish.

Diabetes Education and Technology Team

Pamela Jones

Pamela Jones RN, BSN

Pam has more than 15 years of nursing experience in the Tampa Bay area, including outpatient care, inpatient care, and home health care. She has been a school nurse for children at Nina Harris Exceptional Student Center in Pinellas County. Pam has also served as Diabetes/Endocrinology Coordinator for Children's Medical Services, specializing in care management. She especially enjoys teaching patients and families at every step of the care process.