[1] Johns Hopkins Univ, Johns Hopkins Hosp, Ciccarone Prevent Cardiol Cntr, Baltimore, MD USA
[2] NIH, Bethesda, MD 20892 USA
[3] Wake Forest Baptist Med Cntr, Winston Salem, NC USA
[4] Weill Cornell Med Coll, New York, NY USA
[5] Emory Univ, Sch Med, Atlanta, GA USA
[6] Northwestern Univ, Dept Prevent Med, Feinberg Sch Med, Chicago, IL 60611 USA
[7] Columbia Univ, Div Pulm Allergy & Crit Care Med, New York, NY USA
[8] Univ Calif Los Angeles, Harbor UCLA, Los Angeles Biomed Rsch Inst, Los Angeles, CA USA