Dr. Birnstein received his undergraduate degree from the University of California, Berkeley and his medical degree from the Keck School of Medicine of USC. He completed his internship and residency in internal medicine at the Los Angeles County-USC Medical Center, where he served as chief resident. Dr. Birnstein completed his gastroenterology fellowship at Memorial Sloan Kettering Cancer Center in New York City, where he received specialized training in gastrointestinal complications of cancers…