Fig. 1.

a Schematic representation of the medical record review phase of the study. Of the 654 patients in the database, 26.5 % of them were followed-up at UMHS. Cross-referencing these records with ICD-9 and procedure codes 466, 33.22, and 33.23 for PB, flexible bronchoscopy, and rigid bronchoscopy, respectively, resulted in the identified 23 probable cases. Subsequent medical record review confirmed seven cases. b Schematic representation of the mail-survey portion of the study. After the application of exclusion criteria (see text), the survey was mailed to 528 patients. Of the 211 survey respondents, 1 % reported having been diagnosed with PB, whereas 14 and 24 %, respectively, reported having possible PB now or ever