title: Letter: "Normal values" in Système International units.
mesh_terms: D000641:Ammonia / Q000097:blood; D019411:Clinical Laboratory Techniques / Q000592:standards*; D006452:Hemoglobinometry / Q000592:standards; D006801:Humans; D007391:International Cooperation; D008792:Metric System; D009584:Nitrogen / Q000097:blood; D014894:Weights and Measures / Q000592:standards*; D005719:gamma-Globulins / Q000134:cerebrospinal fluid
chemical_list: D005719:gamma-Globulins; D000641:Ammonia; D009584:Nitrogen