Lipid Profile and Apolipoprotein B Serum Levels in the Vietnamese Population With Newly Diagnosed Elevated Low-Density Lipoprotein Cholesterol and Association With the Single-Nucleotide Variant rs676210: Cross-Sectional Study - Quyen Thuy Nguyen; An Viet Tran; Bao The Nguyen; Hoa Thai Nguyen; Nhung Thi Hong Thai; Hen Huu Phan (JMIR Cardio)