Guttadauro, Angelo, Matteo Maternini, Marco Chiarelli, Sabina Terragni, Giuliano Lobianco, and Francesco Gabrielli. 2019. “Anorectal Manometry Assessment of Sphincter Relaxation After Local-Regional Anesthesia With Posterior Perineal Block”. Annali Italiani Di Chirurgia 90 (6):580-82. https://annaliitalianidichirurgia.it/index.php/aic/article/view/2264.