Costa Monteiro, Sérgio, Liane Correia-Costa, and Elisa Proença. 2019. “Perfusion Index in Preterm Newborns: Predictive Value for Morbimortality and Association With Apgar Score at Five Minutes and CRIB-II Score”. Journal of Pediatric and Neonatal Individualized Medicine (JPNIM) 8 (1). Quartu Sant’Elena (CA, Italy):e080104. https://doi.org/10.7363/080104.