1 In the interests of safety and hygiene please ensure that your Thermos flask is cleaned with warm water and washing-up liquid prior to initial use.  For best results from your flask, before use, pre-fill for about 3 minutes, using either hot water for hot drinks or cold water for chilled drinks.
Extrapolating these findings to the general population, the authors estimated that 8 million elderly persons nationwide have insomnia on any given day, more than 1 million new cases of insomnia develop each year, and symptoms resolve in nearly 1.3 million elderly persons annually.
Myasthenia gravis is relatively rare: the incidence rate is 2 to 5 new cases each year per million of individuals. The prevalence rate is estimated to be approximately 5 out of 100, 000 individuals, or 3000 to 4000 individuals diagnosed with myasthenia gravis in France.