Clarification unrelated to the BMI comment, but the writeup isn't from nih.gov. The article is found through PubMed, a search engine and data repository. Your article was published in the 'British Journal of General Practice'. OP's article is from 'Cureus'. PubMed just has copies of the articles.
Saying its ironic that nih.gov has both articles is somewhat like saying its ironic that Google has any two articles.
Disclaimer directly from the linked webpages: "As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health. Learn more about our disclaimer."
Saying its ironic that nih.gov has both articles is somewhat like saying its ironic that Google has any two articles.
Disclaimer directly from the linked webpages: "As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health. Learn more about our disclaimer."