Heparin versus 0.9% sodium chloride intermittent flushing for preventing occlusion in newborns with peripherally inserted central catheters: A systematic review protocol. - Nascimento, Alice Passos do; de Medeiros, Kleyton Santos; Costa, Ana Paula Ferreira; Sarmento, Ayane Cristine; Cruz, Giovanna Karinny Pereira; Gonçalves, Ana Katherine; de Souza, Nilba Lima; Costa da Silva, Maria de Lourdes (PLoS ONE, 2022)