Conflict of interest statement:
JAS is an inventor on a patent describing methods for detecting cough from sound recordings, licensed to Vitalograph Ltd. JAS has received funding for consultancy and research funds from Afferent Pharmaceuticals, Merck Inc., Bayer, Bellus, GSK, Xention Ltd, Ario Pharma Ltd, Glenmark, Almirall, AstraZeneca, Axalbion, Patara, Verona Pharma, NeRRe Pharmaceuticals, Menlo Pharmaceuticals, Attenua Inc. BJC is on the board of a pharmaceutical company. GW and AH were previous employees of AstraZeneca. HB, CLG, IS, DV, RJD, KH, have no conflicts of interests.