This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced the approval of the first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones. (AP Photo/Roche)

Associated Press
This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced the approval of the first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones. (AP Photo/Roche)
This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced the approval of the first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones. (AP Photo/Roche)
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