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The Lancet has retracted a paper that claimed to show that people who took hydroxychloroquine to treat COVID-19 had a higher risk of developing heart rhythm problems and dying than those who did not.
The author of the paper, Professor Mandeep Mehra, from the Brigham and Women’s hospital in Boston, said he could no longer vouch for the data’s accuracy. One of the other authors is Dr Sapan Desai, who is also the founder of the organisation who provided the data: Surgisphere Corporation.