Precision and accuracy of single-molecule FRET measurements—a multi-laboratory benchmark study gan Hellenkamp, B, Schmid, S, Doroshenko, O, Opanasyuk, O, Kühnemuth, R, Rezaei Adariani, S, Ambrose, B, Aznauryan, M, Barth, A, Birkedal, V, Bowen, M, Chen, H, Cordes, T, Eilert, T, Fijen, C, Gebhardt, C, Götz, M, Gouridis, G, Gratton, E, Ha, T, Hao, P, Hanke, C, Hartmann, A, Hendrix, J, Hildebrandt, L, Hirschfeld, V, Hohlbein, J, Hua, B, Hübner, C, Kallis, E, Kapanidis, A, Kim, J, Krainer, G, Lamb, D, Lee, N, Lemke, E, Levesque, B, Levitus, M, McCann, J, Naredi-Rainer, N, Nettels, D, Ngo, T, Qiu, R, Robb, N, Röcker, C, Sanabria, H, Schlierf, M, Schröder, T, Schuler, B, Seidel, H, Streit, L, Thurn, J, Tinnefeld, P, Tyagi, S, Vandenberk, N, Vera, A, Weninger, K, Wünsch, B, Yanez-Orozco, I, Michaelis, J, Seidel, C, Craggs, T, Hugel, T