We are grateful for the contributions of the following people and organisations to this project:

Guy's and St Thomas' NHS Foundation Trust

Guy's and St Thomas' NHS Foundation Trust sponsored both the Vortal and Listen studies, which provided datasets for this project. Particular thanks to the Critical Care Research Department: Prof Richard Beale, Dr Tim Bonnici, Isabelle Schelcher, Ricky Yang, John Brooks, Katie Lei and John Smith.

King's College London

King's College London have provided academic expertise throughout the project.

The University of Oxford

Colleagues at the University of Oxford have contributed greatly to the project. Particular thanks to Prof Lionel Tarassenko, Dr David Clifton, Dr Peter Watkinson, Dr Marco Pimentel, Dr Christina Orphanidou, Dr Alexander Darrell, Dr Mauricio Villarroel, Stephen Gerry and Jacqueline Birks.

Additional Contributions

Some components of the toolbox of algorithms use additional open source components. Specifically, the QRS detector used was written by Prof. Gari Clifford, and is available here . The PPG pulse peak detector was implemented by Dr Marco Pimentel. The signal quality indices were written by Dr Christina Orphanidou. Finally, the Principal Component Analysis technique uses code from the LS-SVMlab toolbox, written by the group at K.U. Leuven university.

Funding Providers

Thanks to the Engineering and Physical Sciences Research Council (EPSRC) who funded the Vortal and Listen studies (Grant EP/H019944/1). Support has also been provided by the National Institute for Health Research (NIHR) comprehensive Biomedical Research Centre at Guys & St Thomas NHS Foundation Trust, the NIHR Oxford Biomedical Research Centre Programme and the Royal Academy of Engineering (RAEng). The views expressed are those of the authors and not necessarily those of the EPSRC, NHS, NIHR, Department of Health or RAEng.