Publications by authors named "Ralf Jp van der Valk"
Background: The fraction of exhaled nitric oxide (Feno) value is a biomarker of eosinophilic airway inflammation and is associated with childhood asthma. Identification of common genetic variants associated with childhood Feno values might help to define biological mechanisms related to specific asthma phenotypes.
Objective: We sought to identify the genetic variants associated with childhood Feno values and their relation with asthma.