Ugo F, Roveta A, Betti M, Libener R, Maconi A. Standard Operating Procedure (SOP): the starting point for quality research - the reality of Alessandria. Work Paper Public Hlth [Internet]. 2021 Dec. 27 [cited 2024 Nov. 25];9(1). Available from: https://www.pagepress.org/journals/wpph/article/view/9449