Intended Use: The direct LDL cholesterol test is used to determine LDL levels in individuals with high triglyceride levels for which the Friedewald equation for calculating LDL-C from Total cholesterol, HDL-C and triglycerides cannot be used.
3. often Cabinet A body of persons appointed by a head of state or a prime minister to head the executive departments of the government and to act as official advisers. 4. Archaic A small or private room set aside for a specific activity.
The purpose of the Cabinet is  to advise the President on matters relating to the duties of their respective offices. As the President's closest and most trusted advisors, members of the Cabinet attend weekly meetings with the President. The Constitution does not directly mention a Cabinet, but the Constitutional authority for a Cabinet is found in Article II, Section 2.