The uncertain interstellar medium of high-redshift quiescent galaxies: Impact of methodology R. Gobat, C. D’Eugenio, D. Liu, G. B. Caminha, E. Daddi and D. Blánquez A&A, 668 (2022) L4 Published online: 02 December 2022 DOI: 10.1051/0004-6361/202244995