Cryo-EM structures from sub-nl volumes using pin-printing and jet vitrification oleh Raimond B. G. Ravelli, Frank J. T. Nijpels, Rene J. M. Henderikx, Giulia Weissenberger, Sanne Thewessem, Abril Gijsbers, Bart W. A. M. M. Beulen, Carmen López-Iglesias, Peter J. Peters