Hello @acid2come, Thank you for the private message. I thought I would try to answer it here in the discussion to give you some context for my answer and so that other members may be able to help you also.

You mentioned that you thought you were getting somewhere with the last link I posted earlier in this discussion but it keeps knocking you off or locks you out? I'm wondering if you mean that it wants you to pay for the full article? The link just is an abstract and when you click the link in the article for full access they want you to pay for it. A lot of research type articles are setup that way unfortunately. Here is a list of 96 articles that are similar in nature - all having to do with respiratory and environmental.

Publications for Center: National Environmental Respiratory Center (NERC)
-- https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.publications/Center/142

You mentioned in your previous post that you lived in Oklahoma so not able to travel to a Mayo Clinic Campus. Have you thought about a teaching hospital in Oklahoma? I did see that US News & World Report rankings have OU Medical Center in Oklahoma City ranked #1 in adult specialty.
https://health.usnews.com/best-hospitals/area/ok Hopefully other members may be able to share other suggestions with you.

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