EP2809320A1 - (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