title: Clinical Examinations of a 4 hours' Roentgen Retention.
authors.forename: Th
authors.initials: T
authors.lastname: Eiken
mesh_terms: D003287:Contrast Media / Q000008:administration & dosage / Q000266:history*; D005746:Gastric Emptying; D049673:History, 20th Century; D006801:Humans; D011871:Radiology / Q000266:history*; D013997:Time Factors; D014965:X-Rays
chemical_list: D003287:Contrast Media