Correction to: BMC Public Health 21:408 & 21:2336
Hugo Rosado

Abstract
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
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Taxonomy
TopicsClostridium difficile and Clostridium perfringens research · Public Health Policies and Education · Homelessness and Social Issues
Correction to: BMC Public Health21 (Suppl 2), 408 (2021). 10.1186/s12889-021-10448-x and BMC Public Health**21 (Suppl 2), 2336 (2021).**10.1186/s12889-022-13725-5
Following publication of the original articles, the authors brought the following, concerning their use of the ‘MMSE’ instrument to the attention of the journal: We used an unauthorized version of the Portuguese MMSE without permission from PAR. PAR have now granted retrospective permission. The MMSE is a copyrighted instrument and may not be used or reproduced in whole or in part, in any form or language, or by any means without written permission of PAR (www.parinc.com).
