This study was done before all of the recent Keto/Low Carb hype. It only took three weeks to see huge positive changes in lung use. Im sorry, but the full study is behind Elsiviers pay wall (it was in an expensive journal).
There is an open access option offshore at 6 different locations. Just cut and paste the article title in the search field. If an I am not a bot word pops up in Russian, enter it. You can read the PDF or click save to download to desktop. It is a safe website to get around the publication mafias.
Sci-Hub
Complete article:
Effect of Supplementing a High-Fat, Low- Carbohydrate Enteral Formula in COPD Patients
Open Access is being pushed by President Trump for any paper receiving federal funds. Many authors are also now publishing on line pre-publications or with Research Gate to stop the share blocking of their work by groups such as Elsevier.
Authors and research institutions do not receive a penny in royalties from groups such as Elsevier.