McKesson Corporation (NYSE: MCK), a leading healthcare services and information technology company, announced today that it has received notification of early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, in connection with the proposed acquisition of PSS World Medical, Inc. (NASDAQ:PSSI). The termination of this waiting period satisfies one of the conditions for McKesson’s proposed acquisition of PSS World Medical. The transaction remains subject to other customary closing conditions, including approval by the shareholders of PSS World Medical. Subject to satisfaction of these other closing conditions, the acquisition is expected to close in the first calendar quarter of 2013. As previously announced on October 25, 2012, McKesson and PSS World Medical have signed a definitive agreement under which McKesson will acquire all outstanding shares of PSS World Medical for $29.00 per share in cash. About McKesson McKesson Corporation, currently ranked 14th on the FORTUNE 500, is a healthcare services and information technology company dedicated to making the business of healthcare run better. We partner with payers, hospitals, physician offices, pharmacies, pharmaceutical companies and others across the spectrum of care to build healthier organizations that deliver better care to patients in every setting. McKesson helps its customers improve their financial, operational, and clinical performance with solutions that include pharmaceutical and medical-surgical supply management, healthcare information technology, and business and clinical services. For more information, visit http://www.mckesson.com. About PSS World Medical, Inc. PSS World Medical, Inc. (Nasdaq:PSSI) markets and distributes medical products and services to front-line caregivers throughout the United States. With 4,000 team members, PSS is a leader in the markets it serves with innovative approaches to customer service and operational excellence. Its stated purpose is to strengthen the clinical success and financial health of caregivers by solving their biggest problems. The Company is focused to accelerate growth in four markets - Physician, Laboratory, Dispensing, and Home Care & Hospice - with products and solutions that deliver high quality, cost effective, and convenient patient care. For more information on PSS, visit www.pssworldmedical.com. Risk Factors This press release includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended, that are subject to risks and uncertainties and other factors. All statements other than statements of historical fact are statements that could be deemed forward-looking statements, including statements regarding the ability to complete the transaction considering the various closing conditions; the expected benefits and costs of the transaction; any projections of earnings, revenues or other financial items; any statements of the plans, strategies and objectives of management for future operations; any statements regarding product or service development, extensions or integration; any statements of expectation or belief; any statements regarding general industry conditions and competition; any statements regarding economic conditions; and any statements of assumptions underlying any of the foregoing. Risks, uncertainties and assumptions include risks related to the timing or ultimate completion of the transaction, as the transaction is subject to certain closing conditions, including receipt of all necessary regulatory clearances and approval of PSS World Medical’s shareholders; the possibility that expected benefits may not materialize as expected; McKesson’s ability to successfully implement integration strategies; as well as the ability to ensure continued performance or market growth of PSS World Medical’s products and services. These risks, uncertainties and other factors, and the general risks associated with the respective businesses of McKesson and PSS World Medical described in the reports and other documents filed by each of them with the Securities and Exchange Commission, could cause actual results to differ materially from those referred to in the forward-looking statements. All forward-looking statements are based on information currently available to McKesson and PSS World Medical and are qualified in their entirety by this cautionary statement. Except as required by law, neither McKesson nor PSS World Medical assumes any obligation to update any such forward-looking statements or other statements included in this press release.