For Walgreens C.E.O. Stefano Pessina, Rite Aid Deal Is Latest Merger, Maybe Not Last

By HIROKO TABUCHI from NYT Business Day http://www.nytimes.com/2015/10/29/business/dealbook/for-walgreens-ceo-stefano-pessina-rite-aid-deal-is-latest-merger-maybe-not-last.html
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