conducted in the same manner as other work groups for the development of clinical practice guidelines for the Department of Veterans Affairs and the Department of Defense. (f) Rule of construction Nothing in this section shall be construed to prevent the Secretary of Veterans Affairs and the Secretary of Defense from considering all relevant evidence, as appropriate, in creating the clinical practice guideline or guidelines required under subsection (a) or from ensuring that the final clinical practice guideline or guidelines developed under such subsection and subsequently updated, as appropriate, remain applicable to the patient populations of the Department of Veterans Affairs and the Department of Defense.