title: Long-term study of the urinary Strontium-90 and calcium in children.
mesh_terms: D000367:Age Factors; D002118:Calcium / Q000652:urine*; D002136:Calcium, Dietary; D005507:Food Contamination, Radioactive; D006801:Humans; D011044:Poland; D011829:Radiation Dosage; D013325:Strontium Isotopes / Q000652:urine*; D013997:Time Factors
chemical_list: D002136:Calcium, Dietary; D013325:Strontium Isotopes; D002118:Calcium