[1] Univ Wisconsin, Dept Med, Div Cardiovasc Med, Madison, WI USA
[2] Univ Ryukyus, Grad Sch Med Sci, Dept Radiol, Nishihara, Okinawa, Japan
[3] Univ Arkansas, Dept Radiol, Sch Med, Little Rock, AR 72204 USA
[4] Univ Wisconsin, Dept Biostat, Madison, WI USA
[5] Univ Calif San Francisco, Dept Pulm Crit Care, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Pulm & Crit Care Med, San Francisco, CA 94143 USA
[7] St Vincents Univ Hosp, Resp, Dublin, Ireland
[8] Univ Pittsburgh, Med Ctr, Med PACCM, Pittsburgh, PA USA
[9] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[10] Cleveland Clin Fdn, 9500 Euclid Ave, Cleveland, OH 44195 USA
[11] Univ Kansas, Pulm Crit Care & Sleep Med, Kansas City, KS USA
[12] Penn State Univ, Dept Publ Hlth Sci, Hershey, PA USA
[13] Univ Iowa, Radiol, Carver Coll Med, Iowa City, IA USA
[14] Univ Wisconsin, Dept Med, Div Allergy Pulm & Crit Care Med, Madison, WI USA
[15] Univ Wisconsin Hosps & Clin, Madison, WI USA
[16] Univ Wisconsin, Madison, WI USA
[17] Univ Wisconsin, Med, Madison, WI USA
[18] Univ Wisconsin, Dept Radiol, Div Cardiothorac Imaging, Madison, WI 53706 USA