english: In fact, there have been so many studies conducted on publication bias now, over a hundred, that they've been collected in a systematic review, published in 2010, that took every single study on publication bias that they could find.
non_english: In feite zijn er nu meer dan honderd studies over publicatiebias uitgevoerd. Ze werden in 2010 gebundeld  in een systematische evaluatie. Daarin vond je elke ontdekte studie over publicatiebias terug.