You might need to write a different request letter to ask someone who you should write to. In this case, still follow these steps for writing a request letter. Learn the format for a business letter. Your request letter should use the proper business letter format, as it is likely a formal request.
The Epworth Sleepiness Scale (ESS) is a scale intended to measure daytime sleepiness that is measured by use of a very short questionnaire. This can be helpful in diagnosing sleep disorders. It was introduced in 1991 by Dr Murray Johns of Epworth Hospital in Melbourne, Australia.
Fatal Familial Insomnia (FFI) is a rare sleep disorder. It's genetic, and has been diagnosed in less than 40 families worldwide. Perhaps the most famous case is that of the Chicago music teacher, Michael Corke, who featured in the BBC documentary The Man Who Never Slept. FFI is a truly dark disease.