In Denmark and Norway, researchers in two large scientific studies have followed 180,000 children from the womb and onwards. The oldest children in the studies are now 24 years old.
Í Danmark og Noregi hava granskarar í tveimum stórum vísindaligum kanningum fylgt 180.000 børnum úr móðurlívi og fram. Tey elstu børnini í kanningunum eru nú 24 ára gomul.