Incl. Boston Scientific (2000), Zimmer Holdings (1,000), Medtronic (4,500, but could go up to 6,000), Abbott Labs (1,000), St. Jude Medical and more. http://online.wsj.com/article/SB10001424052748703493504576007723119984758.html#video%3DAAFA3140-AAC5-4034-BFBA-B71EEF8F4B29%26articleTabs%3Darticle