Mutations in the Melanocortin 4 Receptor (MC4R) Gene in Obese Patients in Norway - Wangensteen, T.; Pollestad Kolsgaard, M. L.; Mattingsdal, M.; Joner, G.; Tonstad, S.; Undlien, D.; Retterstol, L. (Experimental and Clinical Endocrinology & Diabetes, 2009)