Dear Ciro, 

Check these out: 

Article Psychological symptoms in primary fibromyalgia syndrome: Rel...

Article Psychosomatic Aspects of Primary Fibromyalgia Syndrome [PFS]

Article [Juvenile primary fibromyalgia syndrome--review]

Article Psychosomatic relationships in patients with primary fibromy...

Dear Beatrice and dear Harshvardhan,

thanks for your links.

I would known your experiences and opinion .

The articles you link do not consider DSM-V evaluations  about Somatic Symptom Disorders (SSD).   

Probably, patients with SSD ex DSM-V are only a part of fibromyalgic group.  

But the fact that in psychiatry FP is considered as a psycosomatic disorder is not correct.