Juvet, Lene Kristine; Elvsaas, Ida-Kristin Ørjasæter; Leivseth, Gunnar; Anker, Gun; Bertheussen, Gro F; Falkmer, Ursula; Fors, Egil A; Lundgren, Steinar; Oldervoll, Line Merethe; Thune, Inger; Norderhaug, Inger Natvig (Rapport fra Kunnskapssenteret, Peer reviewed; Research report, 2009-03)