title: Studies of regional ventilation in asthma using 81mKr.
mesh_terms: D000328:Adult; D001249:Asthma / Q000000981:diagnostic imaging* / Q000188:drug therapy; D001993:Bronchodilator Agents / Q000627:therapeutic use; D005260:Female; D006801:Humans; D007726:Krypton; D008297:Male; D008875:Middle Aged; D011868:Radioisotopes; D011877:Radionuclide Imaging
chemical_list: D001993:Bronchodilator Agents; D011868:Radioisotopes; D007726:Krypton