; and (2) operation until 8:00 p.m. on weekdays that are not Federal holidays. (b) Contracts with providers during nights and weekends The Secretary shall enter into contracts, including through locum tenens arrangements, with physicians and nurses that meet qualifications set forth by the Secretary for purposes of this section under which such physicians and nurses work at medical facilities of the Department during nights and weekends. (c) Support staff The Secretary may obtain additional support staff as necessary to carry out this section, including by hiring employees or contracting for services. 6. Conduct of best-practices peer review of each medical center of the Department of Veterans Affairs (a) In general The Secretary of Veterans Affairs may provide for the conduct by a nongovernmental hospital organization of a best-practices peer review of each medical center of the Department of Veterans Affairs to evaluate the efficacy of health care delivered at each such medical center. (b) Priority The Secretary shall give priority for peer review conducted under subsection (a) to the medical centers of the Department with the longest wait times for an appointment or the worst health outcomes, as determined by the Secretary.