The Real Issue vs The Real Value, page-21

"In the final data review, prior to the un-blinding of the study data, ResApp identified at least two issues with the clinical data. Contrary to instructions and training, a high number of patients were treated before clinical research staff recorded their cough sounds. A high number of recordings were also found to contain a second person’s cough sounds or an unacceptable amount of background noise and interference. These issues are known to affect cough sound analysis and their presence has skewed these preliminary results. "