according to Leo's suggestions

inst/assets/bibliography.bib

@@ -5,17 +5,18 @@ @article{Ma2019
   url = {http://dx.doi.org/10.1038/s41396-019-0395-y},
   DOI = {10.1038/s41396-019-0395-y},
   number = {8},
-  journal = {The ISME Journal},
+  journal = {{The ISME Journal}},
   publisher = {Oxford University Press (OUP)},
   author = {Ma,  Zhanshan (Sam) and Li,  Lianwei and Gotelli,  Nicholas J},
   year = {2019},
-  month = mar,
+  month = {mar},
   pages = {1911–1919}
 }
+
 @article{Valles-Colomer2019GBMs,
    author = {Valles-Colomer, Mireia and Falony, Gwen and Darzi, Youssef and Tigchelaar, Ettje F. and Wang, Jun and Tito, Raul Y. and Schiweck, Carmen and Kurilshikov, Alexander and Joossens, Marie and Wijmenga, Cisca and Claes, Stephan and Van Oudenhove, Lukas and Zhernakova, Alexandra and Vieira-Silva, Sara and Raes, Jeroen},
    title = {The neuroactive potential of the human gut microbiota in quality of life and depression},
-   journal = {Nature Microbiology},
+   journal = {{Nature Microbiology}},
    ISSN = {2058-5276},
    DOI = {10.1038/s41564-018-0337-x},
    url = {https://doi.org/10.1038/s41564-018-0337-x},
@@ -26,25 +27,24 @@ @article{Valles-Colomer2019GBMs
 @article{vandeputte2017quantitative,
   title={Quantitative microbiome profiling links gut community variation to microbial load},
   author={Vandeputte, Doris and Kathagen, Gunter and D’hoe, Kevin and Vieira-Silva, Sara and Valles-Colomer, Mireia and Sabino, Jo{\~a}o and Wang, Jun and Tito, Raul Y and De Commer, Lindsey and Darzi, Youssef and Vermeire, Séverine and Falony, Gwen and Raes, Jeroen},
-  journal={Nature},
+  journal={{Nature}},
   volume={551},
   number={7681},
   pages={507--511},
   year={2017},
-  publisher={Nature Publishing Group UK London}
+  publisher={{Nature Publishing Group UK London}}
 }
 
 @article{bastiaanssen2023bugs1,
   title={Bugs as features (part 1): concepts and foundations for the compositional data analysis of the microbiome--gut--brain axis},
   author={Bastiaanssen, Thomaz FS and Quinn, Thomas P and Loughman, Amy},
-  journal={Nature Mental Health},
+  journal={{Nature Mental Health}},
   volume={1},
   number={12},
   pages={930--938},
   doi = {10.1038/s44220-023-00148-3},
-
   year={2023},
-  publisher={Nature Publishing Group US New York}
+  publisher={{Nature Publishing Group US New York}}
 }
 
 @Article{Xu2023,