Here is her reply to someone posting about her study.
On 5th of May: "I will work together with DecodeME."
In another tweet, she refers to
this article as "a short summary of our new research project into ME/CFS" (article GT english)
Some quotes:
"Virtually nothing is known about the biological processes in the body that cause ME/CFS"
"Although many patients have the following symptoms in common: pain, sensitivity to light and sound, concentration and memory problems and severe fatigue."[Note, no PEM mentioned!]
"ME/CFS is also called an exclusion diagnosis: you get that diagnosis when many other conditions have been ruled out. That makes ME/CFS a nasty disease." [Erm, that's not what makes ME/CFS a nasty disease...

And in The Netherlands there is no ruling out of "many other conditions" as that is advised against.]
"
The ME/CFS Lines Consortium uses data from a population study with the health data of more than 160,000 Dutch people from the north of the country. 'In that Lifelines study, many measurements have already been made in people with ME/CFS, even when they were not yet ill,' says Cindy Boer, principal investigator of the 'ME/CFS & genetics: research into the biological cause' subproject."
In reply to her tweeting it, someone asks: "Hopefully, a thorough selection of patients will precede, using CCC or ICC criteria, including PEM as a symptom. Based on Fukuda and without PEM (Lifelines), another over-inclusive mess is being investigated."
Dr. Boer answers: "Certainly! this is also stated at the ME/CFS lines consortium:
"In addition to the CDC, the IOM, ICC and CCC criteria sets will also be mapped out for these participants, after which they will be related to various biomedical mechanisms in sub-projects" and refers to the ZonMw page.
But, as stated earlier, this is opaque wording instead of a clear statement to have the GWAS participants physician diagnosed and fitting ICC or CCC (or IOM) criteria. It looks like they're using Lifelines patients and will see how all four criteria sets apply to the studied group
after the study is done. So the GWAS will be done on a mixed bag of self-reported patients with chronic fatigue, with only a portion of them having ME/CFS (with PEM as a needed feature).
With the text "A nice/beautiful descriptio of the ME/CFS Lines consortium", she also shares
this article (GT eng) by the ME/CVS Stichting, the organisation that's collaborating with ME/CFS lines while all other patient orgs are shut out, and in doing so helps ME/CFS Lines to hold up the mirage that they collaborate with the patient community.
Some quotes:
" According to previous measurements, approximately 2500 participants meet the ME/CFS criteria, but that data has not been further investigated. A wealth of data awaits here. Pre-ME/CFS information is also available for about 400 of them. Lifelines is the only cohort worldwide that has this type of data. It offers a unique opportunity to research the cause of ME/CFS."
"MeCfs Lines is building a separate cohort with biobank² to conduct further research into these 2500 participants. 800 patients are being analyzed in extra depth in the field of systems biology. Then you should think of “big data” research into proteins, into products from the metabolism in cells and from the immune system, and into the microbiome³ that is present in the gastrointestinal tract. The research takes place in the sub-projects. A separate project focuses on the genetics in ME/CFS. An international partnership is being set up for this purpose.
Comparison of the patient data with the other consortium becomes possible. The MeCfs Lines biobank is being harmonized with that of NMCB, taking much of it from the UK ME/CFS Biobank. Both consortia use the extensive DePaul questionnaire, so that patients can be properly compared and classified on the basis of the four well-known criteria sets Fukuda/CDC, IOM, CCC and ICC. Where possible, there will also be cooperation with NMCB at project level."