title: 'Ball's sign' or Bell's sign'.
authors.forename: J
authors.initials: J
authors.lastname: Harvey
mesh_terms: D000368:Aged; D000437:Alcoholism / Q000175:diagnosis*; D001996:Bronchopneumonia / Q000150:complications / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D013902:Radiography, Thoracic