Esophageal coins.
Connors
G P
GP
D002404:Catheterization / Q000706:statistics & numerical data*; D003661:Decision Support Techniques; D004106:Dilatation / Q000191:economics / Q000379:methods; D004724:Endoscopy / Q000191:economics / Q000379:methods*; D004947:Esophagus; D005547:Foreign Bodies / Q000628:therapy*; D017048:Health Care Costs; D006801:Humans; D009717:Numismatics; D012107:Research Design / Q000592:standards