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As a freelancer, I have done many research works, blogs, articles, etc on sleeping factors and health issues. I already wrote and published information about sleep hygiene that needs to be maintained. It covers many things like what to do before and after sleep, while sleeping, sleep positions normally or according to medical conditions, sleeping according to age, sleeping accessories
For More: https://www.amazon.com/Sleepsi....a-Memory-Pillows-Was