Greg Christopher Kaiser, MD

Dr. Ayala is the director of the Hemophilia and Bleeding Disorders Treatment Center at Johns Hopkins All Children's Hospital. She also is the hematology leader of the Young Women Bleeding Disorders/Menorrhagia Clinic, which focuses on a multidisciplinary approach to bleeding symptoms in girls and young women. Dr. Ayala also is involved in the Immune Dysregulation Clinic, which evaluates patients with autoimmune cytopenias in a multidisciplinary approach. Dr. Ayala joined the hospital in 2000. She was the chair of the Division of Hematology/Oncology between 2013-2017 and also served as interim director for the division between 2015-2016. Dr. Ayala's research experience includes multicenter national and international projects. Dr. Ayala received her medical degree from the University of Puerto Rico School of Medicine, her residency training at the San Juan City Hospital in Puerto Rico and her fellowship training at the Emory University School of Medicine Division of Pediatric Hematology/Oncology. Dr. Ayala is a member of the American Society of Pediatric Hematology/Oncology and the Hemophilia and Thrombosis Research Society.

Dr. Beltroy specializes in pediatric gastroenterology for the Johns Hopkins All Children’s Hospital Department of Medicine. He primarily sees patients in Tampa and Lakeland. His clinical interests include eosinophilic esophagitis, inflammatory bowel disease, constipation and abdominal pain. Dr. Beltroy earned his medical degree from Universidad Peruana Cayetano Heredia in Lima, Peru. He trained in pediatrics and served as pediatric chief resident at SUNY Health Science Center in Brooklyn, New York. Dr. Beltroy then completed a pediatric gastroenterology fellowship at Children’s Medical Center of Dallas in Texas. He is fluent in Spanish.

Dr. New is the director of the Sickle Cell Disease Program in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. She joined the hospital staff in 2023. She was previously a hematologist-oncologist at Children’s Healthcare of Atlanta, where she most recently served as director of Diversity, Equity and Inclusion and clinical director of the Egleston Sickle Cell Program in the Aflac Cancer and Blood Disorders Center. Before that she was the Egleston hospital’s section chief of hematology-oncology and clinical director in the Aflac Cancer and Blood Disorders Center in Egleston. She was also associate professor of pediatrics at Emory Pediatric Institute. Dr. New has published numerous peer-reviewed articles and book chapters and has given many talks internationally, nationally and regionally. Her research interests include recruitment for multi-center trials in sickle cell, as well as global initiatives in sickle cell disease service, education and awareness. Dr. New earned her medical degree from Mount Sinai School of Medicine in New York. She completed her pediatric internship and residency at University of Medicine and Dentistry of New Jersey-Robert Wood Johnson University Hospital in New Brunswick, New Jersey. She then completed a fellowship in pediatric hematology-oncology at Columbia University/New York Presbyterian Medical Center.