Revenue from the Medicare and Medicaid programs accounted for approximately 75% of the Company’s revenue for both periods during the three and six months ended June 30, 2009 and 74% and 75% for the three and six months ended June 30, 2008, respectively. The Company records revenue from these governmental and managed care programs as services are performed at their expected net realizable amounts under these programs. The Company’s revenue from governmental and managed care programs is subject to audit and retroactive adjustment by governmental and third-party agencies. Consistent with healthcare industry accounting practices, any changes to these governmental revenue estimates are recorded in the period the change or adjustment becomes known based on final settlements. The Company recorded retroactive adjustments that increased revenue by $57 and $465 for the three and six months ended June 30, 2009, respectively, and $12 and $348 for the three and six months ended June 30, 2008, respectively. The Company records revenue from private pay patients as services are performed.