Eggli K D, Potter B M, Garcia V, Altman R P, Breckbill D L
Pediatr Radiol. 1986;16(6):511-3. doi: 10.1007/BF02387970.
Two pediatric patients presented with long-term respiratory or gastrointestinal complaints after swallowing aluminum poptops. The delay in diagnosis was due in part to poor appreciation of the relative radiolucency of aluminum.