RT Journal Article SR Electronic T1 Patient-Based Studies of Agreement Between Spirometers JF Respiratory Care FD American Association for Respiratory Care SP 587 OP 588 VO 48 IS 6 A1 Thomas A Dillard A1 Juan Reyes A1 Maribeth Johnson A1 Randy Baker YR 2003 UL http://rc.rcjournal.com/content/48/6/587.abstract AB