title: A modification to a recurrence formula for linear first-order equations.
mesh_terms: D000336:Aerosols; D000818:Animals; D006283:Health Physics; D006801:Humans; D001239:Inhalation; D008168:Lung / Q000378:metabolism; D008208:Lymphatic System / Q000378:metabolism; D008954:Models, Biological; D011851:Radioactivity; D011868:Radioisotopes / Q000378:metabolism*
chemical_list: D000336:Aerosols; D011868:Radioisotopes