Read the article that inspired Professor Wilding: Sjöström L, Narbro K, Sjöström CD, Karason K, Larsson B, Wedel H, Lystig T, Sullivan M, Bouchard C, Carlsson B, Bengtsson C, Dahlgren S, Gummesson A, Jacobson P, Karlsson J, Lindroos A-K, Lönroth H, Näslund I, Olbers T, Stelöf K, Torgerson J, Agren G, Carlsson LMS, for the Swedish Obese Subjects Study. Effects of Bariatric Surgery on Mortality in Swedish Obese Subjects. N Engl J Med. 2007, Aug 23(357)8: 741-752. http://pubmed.ncbi.nlm.nih.gov/17715408/