[1] North Shore Med Ctr, Internal Med, Salem, MA USA
[2] Harvard Med Sch, Brigham & Womens Hosp, Div Pulm & Crit Care Med, Boston, MA 02115 USA
[3] Yale New Haven Med Ctr, Div Pulm Crit Care & Sleep Med, 20 York St, New Haven, CT 06504 USA
[4] Massachusetts Gen Hosp, Boston, MA 02114 USA
[5] Brigham & Womens Hosp, Med, 75 Francis St, Boston, MA 02115 USA
[6] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[7] Harvard Med Sch, Brigham & Womens Hosp, Radiol, Boston, MA 02115 USA
[8] Brigham & Womens Hosp, Pulm & Crit Care Med, 75 Francis St, Boston, MA 02115 USA
[9] Brigham & Womens Hosp, Pulm & Crit Care, 75 Francis St, Boston, MA 02115 USA