• Sarah Crook, PhD


    Dr. Crook is an epidemiologist and health services researcher. She joined the team in February 2019 and oversees team analytics. She earned both her BS in Human Physiology and MS in Epidemiology and Biostatistics from the University of Leeds, UK. She then completed her PhD in Epidemiology and Biostatistics at the University of Zurich, Switzerland, and a training fellowship in Guidelines Methodology with Cochrane and the UK’s National Institute of Health and Care Excellence. In her spare time, she enjoys skiing, baking, and taking care of stray cats!

  • Pengfei Jiang, MS

    Data Specialist

    Pengfei Jiang brings extensive knowledge to the team in data management and data analytics. He completed an undergraduate degree in mathematics and economics at UCLA, a masters in biostatistics at The Mailman School at Columbia University, and worked for several years as a financial analyst before joining our team. He is the proud father of a domestic shorthair overweight cat.

  • Katrina Golub, MPH CCRC

    Research Coordinator

    Katrina Golub is a research coordinator for the pediatric cardiac center under the Division of Pediatric Cardiology. She received her MPH from Emory University Rollins School of Public Health and has served as a pediatric research coordinator for nearly two decades. When she is not juggling work and two young children, Ms. Golub enjoys running, coffee, libraries, and being outdoors.

  • Kydanis Clase, BS CCRC

    Research Coordinator

    Ms. Clase is a research coordinator for the pediatric cardiac center under the Division of Pediatric Cardiac Surgery. She helps oversee our team’s involvement in surgery-related clinical trials and other investigations. Her hobbies include traveling, drawing, and reading books.

  • Joyce Woo, MD MS


    Dr. Woo is a pediatric cardiology fellow, with a Masters degree in health economics. Dr. Woo’s research focusses on healthcare access and outcomes disparities in the congenital heart disease population. She enjoys seeing the New York City Ballet, and Chicago Dogs with extra pickles. In July she will return to her hometown of Chicago to start a fourth in fellowship in Cardiovascular Imaging.

  • Phil Allen, BS


    Mr. Allen is a medical student at Columbia University working with our team for the year. Among his many projects, he is developing a novel risk algorithm for congenital heart surgery. When he is not in the lab, he enjoys exploring NYC with his fiancé, walking in the Botanical Gardens in the Bronx, and biking from Manhattan to Coney Island.