Article History
Received: 11 September 2020
Accepted: 30 March 2021
First Online: 7 May 2021
Competing interests
: The University of Maastricht has filed patents with R.J.M.H. and P.J.P. as inventors regarding sample preparation for cryo-EM. G.W. and R.J.M.H. are employed by and P.J.P. is a shareholder of CryoSol-World, which holds the licenses for these submitted patents.
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