Ugo, Francesca, Annalisa Roveta, Marta Betti, Roberta Libener, and Antonio Maconi. “Standard Operating Procedure (SOP): The Starting Point for Quality Research - the Reality of Alessandria”. Working Paper of Public Health 9, no. 1 (December 27, 2021). Accessed July 23, 2024. https://www.pagepress.org/journals/wpph/article/view/9449.