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[Comment] Expression of concern—Tracheobronchial transplantation with a stem-cell-seeded bioartificial nanocomposite: a proof-of-concept study

On Nov 24, 2011, The Lancet published a research article on tracheobronchial transplantation with a stem-cell-seeded bioartificial nanocomposite.1 3 years later, several of the authors, together with others, raised concerns about the validity of this work. The Karolinska Institute launched an investigation led by Professor Bengt Gerdin into papers on the development of the technique. Gerdin’s report was followed by a second evaluation that largely cleared concerns regarding The Lancet paper. More recently, a documentary series on Swedish television again cast doubt on this work and precipitated public uncertainty about the research from Karolinska.

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