RT Journal Article SR Electronic T1 Development and validation of a low-cost electronic stethoscope: DIY digital stethoscope JF BMJ Innovations JO BMJ Innov FD All India Institute of Medical Sciences SP 609 OP 613 DO 10.1136/bmjinnov-2021-000715 VO 7 IS 4 A1 Jain, Agam A1 Sahu, Roshan A1 Jain, Arohi A1 Gaumnitz, Thomas A1 Sethi, Prayas A1 Lodha, Rakesh YR 2021 UL http://innovations.bmj.com/content/7/4/609.abstract AB