RT Journal A1 Mitka M T1 HEparin contamination JF JAMA JO JAMA YR 2010 FD June 9 VO 303 IS 22 SP 2241 OP 2241 DO 10.1001/jama.2010.721 UL http://dx.doi.org/10.1001/jama.2010.721 AB In a letter sent on April 30, ranking minority member Rep Joe Barton (R, Tex) and ranking minority member of the Oversight and Investigations Subcommittee, Michael Burgess, MD, (R, Tex), asked FDA Commissioner Margaret A. Hamburg, MD, to answer questions on the agency's handling of the heparin contamination investigation (http://republicans.energycommerce.house.gov/Media/file/News/043010_Letter_to_FDA_Heparin.pdf).