<qa>  What is the name of the blood sample that will be drawn from all patients at the first andBiochemical tests and imaging: Blood samples will be drawn from all patients at the first and last visits after fasting for 12 hours to measure total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, very low-density lipoprotein cholesterol, triglycerides, glucose, insulin, creatinine, sodium and potassium. 