How to Process Sputum Samples and Extract Bacterial DNA for Microbiota Analysis, Terranova, Leonardo, Oriano Martina, Teri Antonio, Ruggiero Luca, Tafuro Camilla, Marchisio Paola, Gramegna Andrea, Contarini Martina, Franceschi Elisa, Sottotetti Samantha, et al. , International Journal of Molecular Sciences, Jan-10-2018, Volume 19, Issue 10, p.3256, (2018)