Specific airway resistance according to early maternal vitamin D status during pregnancy in children aged 5 to 6 years old from the FEPED cohort (RESPIFEPED) - Gonsard, Apolline; Marquant, Fabienne; Elie, Caroline; Le Bourgeois, Muriel; Houdouin, Véronique; Delclaux, Christophe; Beydon, Nicole; Bellino, Adèle; Souberbielle, Jean-Claude; Sermet-Gaudelus, Isabelle; Delacourt, Christophe; Benachi, Alexandra; et al. (European Journal of Pediatrics, 2025)