Gallstones. NIDDK.NIH.gov. Washington DC: National Institute of Diabetes and Digestive and Kidney Diseases. November 2013 [27 July 2016]. (原始内容存档于16 August 2016).
Gallstones. NIDDK.NIH.gov. Washington DC: National Institute of Diabetes and Digestive and Kidney Diseases. November 2013 [27 July 2016]. (原始内容存档于16 August 2016).