1. National Heart and Lung Institute, Imperial College London, London, U.K.
2. Department of Communications Engineering, University of the Basque Country UPV/EHU, Bilbao, Spain
3. Department of Informatics, Technical University of Munich, Munich, Germany
4. Department of Computer Sciences and Artificial Intelligence, Andalusian Research Institute in Data Science and Computational Intelligence (DaSCI), University of Granada, Granada, Spain
5. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada