Coronary artery disease diagnosis with signal processing and machine learning of heart sound signals: a systematic review. - Aikeliyaer Ainiwaer; Tom J. A. J. Konings; Kaisaierjiang Kadier; Xiang Ma; Muhammet Emin Akpulat; Frits W. Prinzen; Tammo Delhaas; Hongxing Luo (npj Digit. Medicine, 2026)