Letter: International comparisons of surgical rates.
D000328:Adult; D002170:Canada; D002763:Cholecystectomy; D005060:Europe; D005705:Gallbladder Diseases / Q000601:surgery; D013502:General Surgery; D006801:Humans; D013223:Statistics as Topic; D013514:Surgical Procedures, Operative / Q000401:mortality; D006113:United Kingdom; D014481:United States; D000078329:Workforce