C reactive protein; endogenous compound; prednisone; tocilizumab; aged; blindness; blood vessel biopsy; cellulitis; cholecystitis; clinical trial; comparative effectiveness; conference abstract; controlled study; coronavirus disease 2019; drug combination; drug safety; drug therapy; erythrocyte sedimentation rate; female; fragility fracture; giant cell arteritis; human; ischemia; male; open study; outcome assessment; patient safety; prospective study; randomized controlled trial (topic); relapse; remission; rheumatic polymyalgia; systematic review; temporal artery