1. Fauci AS, Braunwald E, Kasper DL, Hauser SL, Longo DL, Jameson JL, Loscalzo J. Harrison's principles of internal medicine. 2008. 17th ed. New York: McGraw-Hill;1509–1514.
2. Lim S, Shin H, Song JH, Kwak SH, Kang SM, Won YJ, Choi SH, Cho SI, Park KS, Lee HK, et al. Increasing prevalence of metabolic syndrome in Korea: the Korean National Health and Nutrition Examination Survey for 1998-2007. Diabetes Care. 2011. 34:1323–1328.
3. Kim SM, Kim KM, Lee DJ. Relationship of uric acid concentration to free fat acid, cardiovascular risk factors and intraperitoneal fat. J Korean Soc Study Obes. 1997. 6:51–58.
4. Christensen AH, Ishak KG. Benign tumors and pseudotumors of the gallbladder: report of 180 cases. Arch Pathol. 1970. 90:423–432.
5. Kozuka S, Tsubone N, Yasui A, Hachisuka K. Relation of adenoma to carcinoma in the gallbladder. Cancer. 1982. 50:2226–2234.
6. Shim SG, Lee KT, Lee JK, Park JH, Ryu KH, Rhee PL, Kim JJ, Koh KC, Paik SW, Rhee JC, et al. Prevalence and risk factors of gallbladder polyps in health screening subjects. Korean J Med. 1999. 57:1014–1020.
7. Chen CY, Lu CL, Chang FY, Lee SD. Risk factors for gallbladder polyps in the Chinese population. Am J Gastroenterol. 1997. 92:2066–2068.
8. Renehan AG, Tyson M, Egger M, Heller RF, Zwahlen M. Body-mass index and incidence of cancer: a systematic review and meta-analysis of prospective observational studies. Lancet. 2008. 371:569–578.
9. Kuriyama S, Tsubono Y, Hozawa A, Shimazu T, Suzuki Y, Koizumi Y, Suzuki Y, Ohmori K, Nishino Y, Tsuji I. Obesity and risk of cancer in Japan. Int J Cancer. 2005. 113:148–157.
10. Larsson SC, Wolk A. Obesity and the risk of gallbladder cancer: a metaanalysis. Br J Cancer. 2007. 96:1457–1461.
11. Segawa K, Arisawa T, Niwa Y, Suzuki T, Tsukamoto Y, Goto H, Hamajima E, Shimodaira M, Ohmiya N. Prevalence of gallbladder polyps among apparently healthy Japanese: ultrasonographic study. Am J Gastroenterol. 1992. 87:630–633.
12. Kim SY, Lee HS, Lee YS, Chung KW, Jang BK, Chung WJ, Park KS, Cho KB, Hwang JS. Prevalence and risk factors of gallbladder polyp in adults living in Daegu and Gyeongbuk Provinces. Korean J Gastroenterol. 2006. 48:344–350.
13. Alberti KG, Zimmet P, Shaw J. IDF Epidemiology Task Force Consensus Group. The metabolic syndrome: a new worldwide definition. Lancet. 2005. 366:1059–1062.
14. Grundy SM, Cleeman JI, Daniels SR, Donato KA, Eckel RH, Franklin BA, Gordon DJ, Krauss RM, Savage PJ, Smith SC Jr, et al. Diagnosis and management of the metabolic syndrome: an American Heart Association/National Heart, Lung, and Blood Institute Scientific Statement. Circulation. 2005. 112:2735–2752.
15. Lee SY, Park HS, Kim DJ, Han JH, Kim SM, Cho GJ, Kim DY, Kwon HS, Kim SR, Lee CB, et al. Appropriate waist circumference cutoff points for central obesity in Korean adults. Diabetes Res Clin Pract. 2007. 75:72–80.
16. Jørgensen T, Jensen KH. Polyps in the gallbladder: a prevalence study. Scand J Gastroenterol. 1990. 25:281–286.
17. Shinchi K, Kono S, Honjo S, Imanishi K, Hirohata T. Epidemiology of gallbladder polyps: an ultrasonographic study of male self-defense officials in Japan. Scand J Gastroenterol. 1994. 29:7–10.
18. Collett JA, Allan RB, Chisholm RJ, Wilson IR, Burt MJ, Chapman BA. Gallbladder polyps: prospective study. J Ultrasound Med. 1998. 17:207–211.
19. Ozdemir A, Ozenc A, Bozoklu S, Cosķun T. Ultrasonography in the diagnosis of gallbladder polyps. Br J Surg. 1993. 80:345.
20. Kim J, Lee K. Relationship between metabolic syndrome and gallbladder stone. Korean J Fam Med. 2009. 30:610–616.
21. Lin WR, Lin DY, Tai DI, Hsieh SY, Lin CY, Sheen IS, Chiu CT. Prevalence of and risk factors for gallbladder polyps detected by ultrasonography among healthy Chinese: analysis of 34 669 cases. J Gastroenterol Hepatol. 2008. 23:965–969.
22. Hayashi Y, Liu JH, Moriguchi H, Takenawa H, Tazawa J, Nakayama E, Marumo F, Sato C. Prevalence of polypoid lesions of the gallbladder in urban and rural areas of Japan: comparison between 1988 and 1993. J Clin Gastroenterol. 1996. 23:158–159.
23. Salmenkivi K. Cholesterolosis of the gall-bladder: a clinical study based on 269 cholecystectomies. Acta Chir Scand. 1964. 105:1S–93S.
24. Tilvis RS, Aro J, Strandberg TE, Lempinen M, Miettinen TA. Lipid composition of bile and gallbladder mucosa in patients with acalculous cholesterolosis. Gastroenterology. 1982. 82:607–615.