The effect of an additional pre-extubational loading dose of caffeine citrate on mechanically ventilated preterm infants (NEOKOFF trial): Study protocol for a multicenter randomized clinical trial - Kinga Kovács; Rita Nagy; Lilla Andréka; Brigitta Teutsch; Miklós Szabó; Péter Varga; Péter Hegyi; Péter Hársfalvi; Nándor Ács; Ágnes Harmath; Csaba Nádor; Ákos Gasparics (PLoS ONE, 2025)