Friedwardt Winterberg, a professor of physics at the University of Nevada, Reno, disputed [2] these conclusions, observing that the galley proofs of Hilbert's articles had been tampered with - part of one page had been cut off. He goes on to argue that the removed part of the article contained the equations that Einstein later published, and he wrote that "the cut off part of the proofs suggests a crude attempt by someone to falsify the historical record". Science declined to publish this; it was printed in revised form in Zeitschrift für Naturforschung, with a dateline of 5 June 2003. Winterberg criticized Corry, Renn and Statchel for having omitted the fact that part of Hilbert's proofs was cut off. Winterberg wrote that the correct field equations are still present on the existing pages of the proofs in various equivalent forms. In this paper, Winterberg asserted that Einstein sought the help of Hilbert and Klein to help him find the correct field equation, without mentioning the research of Fölsing (1997) and Sauer (1999), according to which Hilbert invited Einstein to Göttingen to give a week of lectures on general relativity in June 1915, which however does not necessarily contradict Winterberg. Hilbert at the time was looking for physics problems to solve.