U.S. patent application 20190275287 (applicant University of Pittsburgh, Pittsburgh, Penn.):
"Methods, systems and devices for treating headaches, including migraines. In some variations these methods may include enhancing sleep, including enhancing the quality of sleep, reducing sleep onset time, increasing total sleep time, treating insomnia, and/or treating other neurological disorders by non-invasive temperature regulation of the frontal cortex prior to and/or during sleep. ... Treatment may be accomplished by sustained thermal regulation (warming or cooling) in an appropriate therapeutic range and time using one or more phase change materials."
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