Global cross-sectional survey on neonatal pharmacologic sedation and analgesia practices and pain assessment tools: impact of the sociodemographic index (SDI) by Arribas, C, Cavallaro, G, Gonzalez, J-L, Lagares, C, Raffaeli, G, Smits, A, Simons, SHP, Villamor, E, Allegaert, K, Garrido, F