Usefulness of sputum gram stain for etiologic diagnosis in community-acquired pneumonia: a systematic review and meta-analysis.
Gaspar Del Rio-PertuzJuan F GutiérrezAbel J TrianaJorge L MolinaresAndrea B Robledo-SolanoJosé L MezaOrlando M Ariza-BolívarJorge Acosta-ReyesArgenis GaravitoDiego ViasusJordi CarratalàPublished in: BMC infectious diseases (2019)
This study has been registered at PROSPERO International prospective register of systematic reviews under registration no. CRD42015015337 .