SAN FRANCISCO--(BUSINESS WIRE)--McKesson Corporation (NYSE:MCK) today reported that revenues for the fourth quarter ended March 31, 2015 were $44.9 billion, up 19% compared to $37.8 billion a year ago. On the basis of U.S. generally accepted accounting principles (“GAAP”), fourth-quarter earnings per diluted share from continuing operations was $1.69 compared to $1.72 a year ago. Fourth-quarter GAAP earnings from continuing operations include a pre and post-tax charge of $150 million, or 64 cen