“…A comprehensive search would be conducted in global databases like Cochrane CENTRAL, CINAHL Plus via EBSCO host, MEDLINE via PubMed, EMBASE, SCOPUS, Ovid, Web of Science and ProQuest Medical Library by utilizing the stated search keywords: "Premature neonates", "Preterm birth", "Very low birth weight", "Low birth weight", Preterm, "Preterm infants", "extremely low birth weight", "Neonates", "Neonatal infection", Infection*, "Late-onset sepsis", "Early-onset sepsis", Sepsis, "Neonatal period", "intestinal infection", "Nosocomial infection", septicaemia, Bacteraemia, "septic shock", probiotic*, "Probiotic supplement", Lactobacilli, Lactobacillus, Bifidobacterium, "Lactic acid bacteria", Bacillus OR "Probiotic therapy", "Randomized Controlled Trial", and "Nonrandomized controlled trial" (Extended data 38 ). Term neonates and preterm neonates without sepsis.…”