X-raying winds in distant quasars: The first high-redshift wind duty cycle E. Bertola, M. Dadina, M. Cappi, C. Vignali, G. Chartas, B. De Marco, G. Lanzuisi, M. Giustini and E. Torresi A&A, 638 (2020) A136 Published online: 25 June 2020 DOI: 10.1051/0004-6361/202037742