Magnetic Resonance Spectroscopy / Longevity / Humans / Female / Male / Population based study / Netherlands / Lipid metabolism / Lipoprotein(a) / Aged / Middle Aged / Particle Size / Lipoproteins / European Continental Ancestry Group / High Density Lipoprotein / Low Density Lipoprotein (LDL) / General Population / Population based study / Netherlands / Lipid metabolism / Lipoprotein(a) / Aged / Middle Aged / Particle Size / Lipoproteins / European Continental Ancestry Group / High Density Lipoprotein / Low Density Lipoprotein (LDL) / General Population