High metal content of highly accreting quasars: Analysis of an extended sample K. Garnica, C. A. Negrete, P. Marziani, D. Dultzin, M. Śniegowska and S. Panda A&A, 667 (2022) A105 Published online: 11 November 2022 DOI: 10.1051/0004-6361/202142837