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. 2022 Mar 16;10:756643. doi: 10.3389/fped.2022.756643

Figure 2.

Figure 2

Approach to screening abstracts, titles and texts for eligibility. LMIC, low- and middle-income country; SDI, Socio-Demographic Index; NICU, neonatal intensive care unit; PICU, pediatric intensive care unit.