1 Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Biotechnology, Stem Cell Physiology, 31535, Neustadt, Germany. Wilfried.kues@fli.de.
2 Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Biotechnology, Stem Cell Physiology, 31535, Neustadt, Germany.
3 Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, 125001, India.