Corrigendum to ‘Review of research into bioregenerative life support system(s) which can support humans living in space’ [life sciences in space research 31 (2021) 113–120] (Life Sciences in Space Research (2021) 31 (113–120), (S2214552421000663), (10.1016/j.lssr.2021.09.003))

The authors regret that the "three key conditions" in the final paragraph of Section 5 (page 6 of the article/ page 118 of the volume) is not sufficiently accurate. The revised corrected paragraph in full can be found below: First key condition: If all food comes from BLSS's internal biosynthesis, the oxygen produced is sufficient for the crew's breathing need. Second key condition: If there is organic matter input from outside, it must be balanced by organic matter output of the same respiration quotient synthesized inside. Third key condition: The gas balance of BLSS cannot be achieved by biological self-organization and calls for human intervention. The authors would like to apologise for any inconvenience caused. DOI of original article: 10.1016/j.lssr.2021.09.003 * Corresponding author at: 37 Xueyuan Road, Haidian District, Beijing, 100191, China. ¹ Co-corresponding authors. E-mail addresses: lh64@buaa.edu.cn (H. Liu), fengjiajie@buaa.edu.cn (J. Feng).