The following video is part of our "Motley Fool Conversations" series, in which health-care editor/analyst David Williamson discusses topics around the investing world.

In this series, David takes a look at three health-care stocks that have doubled and examines whether they can keep it going for the rest of the year. Today's edition features Pharmacyclics, with BTK inhibitor ibrutinib, Affymax, which recently received approval for Omontys, and the ongoing march of XOMA's 052 drug candidate through clinical trials. Can these stocks keep running? Watch and find out.

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