EP2809320B1 - (1r,4r)-6'-Fluoro-(n-Methyl- or N,n-Dimethyl-)-4-Phenyl-4',9'-Dihydro-3'h-Spiro-[cyclohexane-1,1'-Pyrano[3,4,b]indol]-4-Amine for Treating Fibromyalgia and Chronic Fatigue Syndrome