Nurses' knowledge of the italian ministerial recommendation no. 4 (MR4) on the prevention of patient suicide in hospitals: a pilot study - Maurizio Calamita; Donatella D'Accolti; Carmela Marseglia; Carmela Fiore; Stefania Crescenza Pietanza; Salvatore Grasso; Livio Melpignano; Antonio Pisciotta; Laura Pagliari; Noemi Chiumarolo; Vito Muschitiello (Dissertation Nursing, 2025)