Thank you all for your answers, they are very useful! I am very glad that I found this forum.
Someone in the POIS forum at reddit told me that I could tell her, if it becomes relevant, that there is a research grant available for someone to study POIS. He said that the National Organisation of Rare Diseases (NORD) give the grant and that people at POISCenter know everything about it. I tried to look at their website and it seems like the grant can be up to 31.000 USD. However, I am not certain whether or not it is available for Danish (non-american) researchers as well? I ask this because I am living in Denmark.