Is this database open? If so, anyone in the same situation as the daughter in this article could spend the hours, rather than hoping a professional will. Not to self-diagnose, but to narrow down the list to a number of candidates the professionals are willing to look through. Sure, what takes the M.D. 6 hours might take me 40 hours, but if the alternative is 10 years of suffering for someone I love, it's easily worth doing.
On a similar note, I have combed through a bunch of research on a particular type of medication recently, and I hope the fruits of my labour will pay off. Time will tell. Either way, I have learned a lot.
Once you are dealing with somethibg that is difficult to diagnose and/or resistant to treatment (I might argue the two are the same thing on a fundamental level), a surprisingly large portion of medical care turns DIY. They never tell you this but unless you are actually made of bucks and can visit the best specialists in the world, it won't take long until you know more than the doctors you meet about the specific problem you're dealing with.