In the Insulin Resistance Atherosclerosis Family Study (IRASFS), heritability estimates suggest a strong genetic basis: low-density lipoprotein (LDL, h2 = 0.50), high-density lipoprotein (HDL, h2 = 0.57), total cholesterol (TC, h2 = 0.53), and triglyceride (TG, h2 = 0.42) levels. Publication by Gao C, Tabb KL, Dimitrov LM, Taylor KD, Wang N, Guo X, Long J, Rotter JI, Watanabe RM, Curran JE, Blangero J, Langefeld CD, Bowden DW, Palmer ND.