; (II) an assessment of the benefit of the program to covered veterans in mental health diagnoses, pain management, and treatment of chronic illness; and (III) the comparative effectiveness of various complementary and alternative medicine therapies. (ii) Barriers identified under subsection (a)(2) that were not resolved. (iii) Such recommendations for the continuation or expansion of the program as the Secretary considers appropriate. (i) Complementary and alternative medicine defined In this section, the term complementary and alternative medicine shall have the meaning given that term in section 2(e) of this Act. (j) Effective date This section shall take effect on the date that is one year after the date of the enactment of this Act. 4. Studies of barriers encountered by veterans in receiving, and administrators and clinicians in providing, complementary and alternative medicine services furnished by the Department of Veterans Affairs (a) Studies required (1) In general The Secretary of Veterans Affairs shall conduct comprehensive studies of the barriers encountered by veterans in receiving, and administrators and clinicians in providing, complementary and alternative medicine services furnished by the Department of Veterans Affairs. (2) Studies conducted (A) Veterans In conducting the study of veterans, the Secretary shall— (i) survey veterans who seek or receive hospital care or medical services furnished by the Department, as well as veterans who do not seek or receive such care or services; (ii) administer the survey to a representative sample of veterans from each Veterans Integrated Service Network; and (iii) ensure that the sample of veterans surveyed is of sufficient size for the study results to be statistically significant. (B) Administrators and clinicians In conducting the study of clinicians and administrators, the Secretary shall— (i) survey administrators of the Department who are involved in the provision of health care services