APOC3 and obesity due to melanocortin 4 receptor deficiency: Given the role of apoC3 in TG metabolism, and the association of dyslipidemias characterized by high TG and low HDL cholesterol with HTN, we tested whether common genetic variants of APOC3 were associated with incident HTN according to the stratification of lifestyle-related factors, specifically, obesity and physical activity level, in a community-based Korean cohort.