[1] Mayo Clin, Dept Immunol, 13400 East Shea Blvd, Scottsdale, AZ 85259 USA
[2] Baylor Univ, Inst Biomed Studies, Waco, TX 76798 USA
[3] North Texas Inst Clin Trials, Ft Worth, TX USA
[4] Baylor Univ, Med Ctr, Martha Foster Lung Care Ctr, Dallas, TX USA
[5] Stephen F Austin State Univ, Dept Math & Stat, Nacogdoches, TX 75962 USA