This study (and B.K. in person) was supported by the Deutsche Forschungsgemeinschaft (DFG) as part of the International Research Training Group between Justus Liebig University of Giessen and Monash University, Melbourne (GRK 1871/1) on 'Molecular pathogenesis on male reproductive disorders'. T.H., H.-C.S. and M.B. were supported by the LOEWE focus group 'MIBIE' (male infertility during infection & inflammation)-an excellence initiative of the German state government of Hessen. From the Australian side, K.L. was supported by NHMRC grants (Fellowship, ID1079646 and Project, ID1081987); K.L., S.I. and M.H. received scholarship (S.I.) and research funding (K.L., M.H.) from Monash University. The project also drew support from the Victorian Government's Operational Infrastructure Support Program. The authors have no competing interests to declare.
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