nej m 199304293281701

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  • 7/26/2019 Nej m 199304293281701

    1/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    2/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    3/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    4/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    5/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    6/7The New England Journal of Medicine

    Downloaded from nejm.org on September 10, 2015. For personal use only. No other uses without permission.Copyright 1993 Massachusetts Medical Society. All rights reserved.

  • 7/26/2019 Nej m 199304293281701

    7/7The New England Journal of Medicine

    D l d d f j S b 10 2015 F l l N h i h i i