; and (2) the term wholesale acquisition cost has the meaning given such term in section 1847A(c)(6)(B) of the Social Security Act. . 368. Study by Comptroller General of United States (a) In general The Comptroller General of the United States (referred to in this section as the Comptroller General ) shall, in consultation with appropriate stakeholders, conduct a study on the role of pharmacy benefit managers. (b) Permissible examination In conducting the study required under subsection (a), the Comptroller General may examine various qualitative and quantitative aspects of the role of pharmacy benefit managers, such as the following: (1) The role that pharmacy benefit managers play in the pharmaceutical supply chain. (2) The state of competition among pharmacy benefit managers, including the market share for the Nation’s largest pharmacy benefit managers. (3) The use of rebates and fees by pharmacy benefit managers, including— (A) the extent to which rebates are passed on to health plans and whether such rebates are passed on to individuals enrolled in such plans; (B) the extent to which rebates are kept by such pharmacy benefit managers