Dr. Cheng received her medical degree at the School of Medicine and Biomedical Sciences at University of Buffalo, followed by an internal medicine residency at Rush University Medical Center in Chicago. She then completed a fellowship in endocrinology, diabetes, and metabolism at University of California San Francisco and participated in a non-ACGME fellowship in bone and mineral disorders at Washington University in St Louis. Prior to joining Labcorp, she worked as a clinical endocrinologist at Northeast Community Clinic in Los Angeles.

Dr. Holmquist earned his PhD in interdisciplinary life sciences from the University of California. He is board-certified in clinical chemistry and holds laboratory director qualifications in California and New York. He serves as a member of the American Association of Clinical Chemistry (AACC), the Endocrine Society, the American Society for Mass Spectrometry (ASMS), Clinical Laboratory Standards Institute (CLSI) and is a founder of the Los Angeles Metropolitan Mass Spectrometry Group (LAMMS).

Dr. Grant earned a PhD in chromatographic and mass spectrometric technologies from the University of Swansea, Wales, United Kingdom. He continued his scientific training in various industrial settings, which have included senior scientist at GSK, principal scientist at Cohesive Technologies, technical director at Eli Lilly, and director of mass spectrometry at Esoterix Endocrinology.

Dr Kelly Chun is vice president and scientific director of Esoterix/Endocrine Sciences, a Labcorp specialty laboratory. With over 20 years of protein science and assay development experience, Dr Chun oversees a complex, high-throughput endocrine reference laboratory while leading research and development activities.

Dr. Valcour serves as either national discipline director of the following Labcorp clinical specialties: endocrinology, allergy, hemostasis/thrombosis and automated immunoassay.

Dr Katayev earned his medical degree at the Leningrad Institute of Medicine and Hygiene, Leningrad, Russia. He completed his residency in dermatology and sexually transmitted diseases at Svetogorsk Regional Hospital, Leningrad, Russia in 1983. He completed his residency in Dermatology and Sexually transmitted Diseases at Leningrad Regional Hospital. Dr Katayev joined Labcorp in 1994, moved to Science & Technology in 2007 and serves as Labcorp’s director of clinical science assessment in the Department of Science and Technology.