Thalassemia Team Members

Ashutosh Lal, MD
Director, Thalassemia Program
Pediatric Hematologist/Oncologist
Elliott Vichinsky MD
Pediatric Hematologist/Oncologist
Sylvia Titi Singer MD
Director, Hemoglobinopathy Reference Laboratory
Pediatric Hematologist/Oncologist
Mark Walters MD
Director, Blood & Bone Marrow Transplant Program
Director, Cord Blood Program
Medical Director, Jordan Family Center for BMT & Cellular Therapies Research
Pediatric Hematologist/Oncologist
Gregory Kurio, MD
Pediatric Cardiologist
Tariq Ahmad, MD
Pediatric Endocrinologist
Paul Harmatz, MD
Pediatric Gastroenterologist
Ellen Fung, PhD, RD, CCD
Dr. Fung is a Research Scientist at CHORI with advanced training in nutrition and a long-standing interest on the impact of nutrition in children with chronic disease. She is a registered dietitian and Certified Clinical Densitometrist. She came to CHRCO in 2000 and is the Director of the Bone Density Clinic at CHRCO.
Marcella Weyhmiller, PhD
Dr. Weyhmiller received her BSc from UC Berkeley and PhD from the University of Washington in Materials Science Engineering where her thesis focused on the magnetic properties of iron oxide nanoparticles. As the Coordinator for the SQUID-Ferritometer Program she measures liver iron concentration (LIC) using the SQUID, a safe, painless, quick and non-invasive technique that utilizes a superconducting magnetic sensor.



  • Ashutosh Lal, MD -- Director, Thalassemia Program
  • Elliott Vichinsky, MD
  • Mark Walters, MD -- Director, Blood &  Bone Marrow Transplant Program
  • Sylvia Titi Singer, MD -- Director, Hemoglobinopathy Reference Laboratory


  • Gregory Kurio, MD


  • Tariq Ahmad, MD


  • Paul Harmatz, MD


  • Anne Rishon, PNP

Social Worker

  • Marisa Schweberkoren, MSW

Bone Density & Nutrition Science

  • Ellen Fung, PhD, RD, CCD
  • Yennie Lo, RDA

Iron Measurement & Research

  • Marcela Weyhmiller, PhD


  • Raquel Manzo -- Thalassemia Program Coordinator
  • Julie Gervacio -- Office Associate
  • Salini Gadupudi -- Clinical Research Coordinator


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