title: Drying of Guthrie samples.
mesh_terms: D001681:Biological Assay; D001800:Blood Specimen Collection; D006801:Humans; D010209:Paper; D010649:Phenylalanine / Q000097:blood*; D011095:Polyethylenes
chemical_list: D011095:Polyethylenes; D010649:Phenylalanine