title: [Analysis of serum concentrations of zinc, copper, manganese and the copper-zinc ratio in discoid lupus erythematosus with stepwise regression].
authors.forename: H S
authors.initials: HS
authors.lastname: Yu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003300:Copper / Q000097:blood*; D005260:Female; D006801:Humans; D008179:Lupus Erythematosus, Discoid / Q000097:blood*; D008297:Male; D008345:Manganese / Q000097:blood; D008875:Middle Aged; D012044:Regression Analysis; D015032:Zinc / Q000097:blood*
chemical_list: D008345:Manganese; D003300:Copper; D015032:Zinc