Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo Blindern, Norway 0317. Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo Blindern, Norway 0317; Norwegian National Advisory Unit on Familial Hypercholesterolemia, Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital Nydalen, Norway 0424. TINE SA, Innovation and Marketing, 0187 Oslo, Norway. Department of Clinical Biochemistry, KB 3014, Rigshospitalet, University of Copenhagen, Denmark 2100. Research Unit of Biomedicine, and Biocenter of Oulu, Oulu University Hospital and Medical Research Center, Finland 90014. Research Unit of Biomedicine, and Biocenter of Oulu, Oulu University Hospital and Medical Research Center, Finland 90014; Department of Gastroenterology and Metabolism, Poznan University of Medical Sciences, Poland 60-572. Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo Blindern, Norway 0317. Electronic address: smulven@medisin.uio.no.