Cynthia M. MoorheadAugust 8, 2018

Another factor that has been found around the world is high altitudes. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3114154/ https://www.sciencedaily.com/releases/2018/03/180309170654.htm https://www.sltrib.com/news/health/2018/07/01/university-utah-research/ --These are just a few of the many articles online about this connection.