Essential and toxic trace elements: Li,B,Na,Mg,Al,Si,K,Ca,Ti,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Se,Mo,Cd,Sb,Hg,Pb,Ba,Au,V,Ag,Be,Bi,W,Ga,Ge,I,La,Sn,Pt,Rb,Sr,P,Zr (40 elements) in blood