[1] Department of Internal Medicine,
[2] Pulmonary and Critical Care Medicine,undefined
[3] Washington University School of Medicine,undefined
[4] Medical Intensive Care Unit and Respiratory Care Services,undefined
[5] Barnes-Jewish Hospital,undefined
[6] St. Louis,undefined
[7] MO 63110,undefined
[8] USA,undefined
[9] Pulmonary and Critical Care Division,undefined
[10] Campus Box 8052,undefined
[11] Washington University School of Medicine,undefined
[12] 660 South Euclid Avenue,undefined
[13] St. Louis,undefined
[14] MO 63110,undefined
[15] USA email: mkollef@pulmonary.wustl.edu Tel. + 1 (3 14) 7 47-37 59 Fax + 1 (3 14) 3 62-13 34,undefined