1. https://www.ncbi.nlm.nih.gov/pubmed/31906573
2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4120752/
3. https://consultqd.clevelandclinic.org/long-term-use-of-ppis-has-consequences-for-gut-microbiome/
4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872783/
5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3101476/
6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4864131/
7. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5557164/
9. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5643276/