9Wohlers Associates. Additive manufacturing and 3D printing state of the industry [R]. Annual Worldwide Progress Report,2012.
10Eng|und M, Joud A, Geborek P,et al. Prevalence and in- cidence of rheumatoid arthritis in southern Sweden 2008 and their relation to prescribed biologies[J]. Rheumatolo- gy,2010,49(8):1563-1569.