1 The Lipid Clinic, Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, P.O. Box 4959 Nydalen, Oslo 0424, Norway.
2 Department of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, P.O. Box 1046 Blindern, Oslo 0317, Norway.
3 Department of Nutrition, Faculty of Health Sciences, Oslo Metropolitan University, P.O. Box 4 St Olavs Plass, Oslo 0130, Norway.
4 National Advisory Unit on Familial Hypercholesterolemia, Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, P.O. Box 4959 Nydalen, Oslo 0424, Norway.
5 Unit for Cardiac and Cardiovascular Genetics, Oslo University Hospital, P.O. Box 4959 Nydalen, Oslo 0424, Norway.