Our Team
Meet Our Cancer and Blood Disorders Team
Our dedicated team of oncologists, hematologists, nurses, and specialists is committed to providing compassionate, leading-edge care for kids and teens facing cancer and blood disorders. With expertise in the latest treatments, clinical trials, and personalized care plans, we strive to offer the best possible outcomes for every patient.
From diagnosis to recovery, our multidisciplinary team works closely with you and your family, ensuring support at every step of your journey. Get to know the experts who are here to guide and care for you with skill, innovation, and compassion.Â
Our Leadership
Douglas J. Harrison, MD, MSÂ
Division Chief, Lisa Dean Moseley Foundation Institute for Cancer and Blood Disorders
Douglas J. Harrison, MD, MS is a board-certified pediatric hematology/oncology specialist who is highly experienced and fellowship-trained with expertise in bone and soft tissue sarcomas and a particular focus on childhood and adolescent rhabdomyosarcoma.
Anderson Collier, MD - Northeast Florida
Division Chief, Hematology/Oncology
Dr. Collier is a pediatric hematologist/oncologist who obtained undergraduate and medical degrees from Vanderbilt University in Nashville, TN.  He then completed his Pediatric residency and Pediatric Hematology-Oncology fellowship at University of Texas Southwestern in Dallas, TX where he did research on the RASSFIA pathway in Wilm tumors.  Following fellowship, he returned to Vanderbilt Children's Hospital as an assistant professor where he helped to organize the multidisciplinary sarcoma program.Â
Mary Toth, MD - Central Florida
Interim Division Chief, Hematology/Oncology
Dr. Toth is a rheumatologist at ÀÖ²¥´«Ã½ Children’s Hospital, Florida and professor of pediatrics at the University of Central Florida Medical School. Dr. Toth has over 30 years of experience in clinical rheumatology and research. After graduating from Northeast Ohio Universities College of medicine and completing a pediatrics residency at Medical College of Ohio at Toledo, she completed her rheumatology fellowship at the University of Michigan.Â
Our Cancer & Blood Disorders Team
In our center, your child truly comes first. Every member of our team is here to provide advanced treatment and compassionate, life-changing care.Â
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Kelly Anne Ryan, MD
Cardiac Anesthesia Clinical Assistant Professor of Anesthesiology and Pediatrics at Sidney Kimmel Medical College, Thomas Jefferson University