Show 15 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: keyword exact "ADD" Add to list Journal Article A1 open access Effect of Pycnogenol® on attention-deficit hyperactivity disorder (ADHD) : study protocol for a randomised controlled trial Annelies AJ Verlaet, Berten Ceulemans, Helene Verhelst (UGent) , Dirk Van West, Tess De Bruyne, Luc Pieters, Huub FJ Savelkoul and Nina Hermans (2017) TRIALS. 18.