Both of these sources of information are worth a read. The Americans are much more aware and ahead of the newly formed European initiative on RLS. Their research is much more focussed with extracts available to read.
The Scientific and Medical Advisory Board of the Restless Legs Syndrome Foundation wrote and published this back in 2020. It is now available on line and although technical is full of useful references. It also talks about the occurrence of RLS and the factors contributing to its development. mayoclinicproceedings.org/a...
The UK 'NICE' site have also considerably upgraded (2024) their page on RLS .. BUT if you look all their references are limited to pre 2015 and many of these references are more that 12 years old. NICE is what you can refer UK doctors to read .. if they are capable of understanding it. cks.nice.org.uk/topics/rest...
Notably Professor Christopher Earley who was quoted in a recent post on here, Dr Mark Buchfuhrer and others are the authors of the American paper.