The development of preterm infants from low socio-economic status families: The combined effects of melatonin, autonomic nervous system maturation and psychosocial factors (ProMote): A study protocol - Theano Kokkinaki; Nicole Anagnostatou; Maria Markodimitraki; Theano Roumeliotaki; Manolis Tzatzarakis; Elena Vakonaki; Giorgos Giannakakis; Aristidis Tsatsakis; Eleftheria Hatzidaki (PLoS ONE, 2025)