The Guardian, August 31, 2010

The stethoscope – medical icon, lifesaver and doctor's best friend – is disappearing from hospitals across the world as physicians increasingly use their smartphones to monitor patients' heartbeats.

More than 3 million doctors have downloaded a 59p application – invented by Peter Bentley, a researcher from University College London – which turns an Apple iPhone into a stethoscope.

Last week, Bentley introduced a free version of the app, which is being downloaded by more than 500 users a day. Experts say the software, a major advance in medical technology, has saved lives and enabled doctors in remote areas to access specialist expertise.

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