@John *******
It's a synthesis of what I've read a variety of places, including medical journals, over the last several months and many years of experience. It's not plagiarized.
I have a PhD In public health. I'm retired now - no need to call me doctor. You can if you want. I'm a former senior scientist at the American Cancer Society and former research director at MD Anderson Cancer Center.
I'm a co-author on a couple of papers published in JAMA (Journal of the American Medical Association) in the last couple of years. You can find me on Google Scholar or Google for that matter.