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Ransom, C. Sada, C. Vignoli, C. Wiesinger, D. Borowicz, D. Stukov, D. Zinatulina, E. Bellotti, E. Bossio, E. Doroshkevich, E. Shevchik, E. V. Demidova, E. Yanovich, F. Fischer, F. Salamida, GERDA Collaboration: M. Agostini, G. Lutter, G. R. Araujo, G. Zuzel, H. Khushbakht, H. Simgen, I. Barabanov, I. Lippi, I. Nemchenok, I. V. Kirpichnikov, I. Zhitnikov, J. Hakenm\\\"uller, J. Huang, J. Janicsk\\'o Cs\\'athy, J. Jochum, J. Schreiner, K. Gusev, K. Panas, K. Pelczar, K. T. Kn\\\"opfle, K. von Sturm, K. Zuber, L. Baudis, L. Bezrukov, L. Manzanillas, L. Pandola, L. Pertoldi, L. Rauscher, L. Shtembari, L. V. Inzhechik, M. Balata, M. Fomina, M. Hult, M. Junker, M. Laubenstein, M. Lindner, M. Miloradovic, M. Misiaszek, M. Sch\\\"utt, M. Schwarz, M. Shirchenko, M. Wojcik, N. Di Marco, N. Rumyantseva, O.Kochetov, O. Schulz, O. Selivanenko, P. Grabmayr, P. Krause, P. Moseev, P. Piseri, R. Brugnera, R. Hiller, R. Knei{\\ss}l, R. Mingazheva, S. Belogurov, S. Hemmer, S. Riboldi, S. 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