Sciberras, N., A. Pisani, V. Vella, E. Zahra Bianco, C. Vassallo, and P. Ellul. “An Updated Comparative Study on the Impact of COVID-19 Infection and Vaccination in Patients With Inflammatory Bowel Disease and Irritable Bowel Syndrome”. Journal of Gastrointestinal and Liver Diseases, Vol. 31, no. 4, Dec. 2022, pp. 424-8, doi:10.15403/jgld-4534.