Questions continue for Surgisphere and CEO Sapan Desai as universities deny knowledge of links to firm behind Lancet’s now-disputed blockbuster study

Dozens of scientific papers co-authored by the chief executive of the US tech company behind the Lancet hydroxychloroquine study scandal are now being audited, including one that a scientific integrity expert claims contains images that appear to have been digitally manipulated.

The audit follows a Guardian investigation that found the company, Surgisphere, used suspect data in major scientific studies that were published and then retracted by world-leading medical journals, including the Lancet and the New England Journal of Medicine.