Fig. 1From: Serum nicotinamide phosphoribosyltransferase as a novel biomarker for non-traumatic osteonecrosis of the femoral headA Comparison of serum NAMPT levels between NONFH patients and healthy controls. B Comparisons of serum NAMPT levels among different ARCO stages. C Comparisons of serum NAMPT levels among alcohol induced, steroid-induced and idiopathic NONFH. D Comparison of serum NAMPT levels between unilateral and bilateral NONFHBack to article page