Fullformexpand.com, 2026. "UGI SERIES." Accessed April 22, 2026. https://www.fullformexpand.com/ugi-series/upper-gastrointestinal-series.
"UGI SERIES." (n.d.). Fullformexpand.com. Retrieved April 22, 2026, from https://www.fullformexpand.com/ugi-series/upper-gastrointestinal-series.
UGI SERIES. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/ugi-series/upper-gastrointestinal-series (Accessed: 22 April 2026).