| 1. | ?Sandu MM, Protasiewicz DC, Fir?nescu AG, et al. Data regarding the prevalence and incidence of diabetes mellitus and prediabetes. Rom J Diabetes Nutr Metab Dis, 2016, 23(1): 95-103. | 
				                                                        
				                                                            
				                                                                | 2. | González EL, Johansson S, Wallander MA, et al. Trends in the prevalence and incidence of diabetes in the UK: 1996-2005. J Epidemiol Community Health, 2009, 63(4): 332-336. | 
				                                                        
				                                                            
				                                                                | 3. | Stumvoll M, Goldstein BJ, Haeften TWV, et al. Type 2 diabetes: principles of pathogenesis and therapy. Lancet, 2005, 365(9467): 1333-1346. | 
				                                                        
				                                                            
				                                                                | 4. | Chiu KC, Chu A, Go VLW, et al. Hypovitaminosis D is associated with insulin resistance and β cell dysfunction. Am J Clin Nutr, 2004, 79(5): 820-825. | 
				                                                        
				                                                            
				                                                                | 5. | Mattila C, Knekt P, M?nnist? S, et al. Serum 25-hydroxyvitamin D concentration and subsequent risk of type 2 diabetes. Diabetes Care, 2007, 30(10): 2569-2570. | 
				                                                        
				                                                            
				                                                                | 6. | Pittas AG, Dawson-Hughes B, Sheehan PR, et al. Rationale and design of the vitamin D type 2 diabetes (D2d) study: a diabetes prevention trial. Diabetes Care, 2014, 37(12): 3227-3234. | 
				                                                        
				                                                            
				                                                                | 7. | Tahrani AA, Ball A, Shepherd L, et al. The prevalence of vitamin D abnormalities in South Asians with the type 2diabetes mellitus in the UK. Int J Clin Pract, 2010, 64(3): 351-355. | 
				                                                        
				                                                            
				                                                                | 8. | Hirani V, Cumming RG, Le Couteur DG, et al. Low levels of 25-hydroxyvitamin D and active 1, 25-dihydroxyvitamin D independently associated with type 2 diabetes mellitus in older Australian men:The concord health and aging in men project. J Am Geriatr Soc, 2014, 62(9): 1741-1747. | 
				                                                        
				                                                            
				                                                                | 9. | Chailurkit LO, Aekplakorn W, Ongphiphadhanakul B, et al. The association between vitamin D status and type 2 diabetes in Thai population, a cross-sectional study. Clin Endocrinol, 2012, 77(5): 658-664. | 
				                                                        
				                                                            
				                                                                | 10. | Mitri J, Muraru MD, Pittas AG. Vitamin D and type 2 diabetes, a systematic review. Eur J Clin Nutr, 2011, 65(9): 1005-1015. | 
				                                                        
				                                                            
				                                                                | 11. | Song Y, Wang L, Pittas AG, et al. Blood 25-hydroxyvitamin D levels and incident type 2 diabetes: a meta-analysis of prospective studies. Diabetes Care, 2013, 36(5): 1422-1428. | 
				                                                        
				                                                            
				                                                                | 12. | Marques-Vidal P, Vollenweider P, Guessous I, et al. Serum vitamin D concentrations are not associated with insulin resistance in Swiss adults. J Nutr, 2015, 145(9): 2117-2122. | 
				                                                        
				                                                            
				                                                                | 13. | American Diabetes Association. Diagnosis and classification of diabetes mellitus. Diabetes Care, 2014, 37(Suppl): S81-S90. | 
				                                                        
				                                                            
				                                                                | 14. | Follmann D, Elliott P, Suh I, et al. Variance imputation for overviews of clinical trials with continuous response. J Clin Epidemiol, 1992, 45(7): 769-773. | 
				                                                        
				                                                            
				                                                                | 15. | Breslavsky A, Frand J, Matas Z, et al. Effect of high doses of vitamin D on arterial properties, adiponectin, leptin and glucose homeostasis in type 2 diabetic patients. Clin Nutr, 2013, 32(6): 970-975. | 
				                                                        
				                                                            
				                                                                | 16. | Ryu OH, Chung W, Lee S, et al. The effect of high-dose vitamin D supplementation on insulin resistance and arterialstiffness in patients with type 2 diabetes. Korean J Intern Med, 2014, 29(5): 620-629. | 
				                                                        
				                                                            
				                                                                | 17. | Baziar N, Jafarian K, Shadman Z, et al. Effect of Therapeutic Dose of Vitamin D on Serum adiponectin and glycemia in vitamin D-insufficient or deficient type 2 diabetic patients. Iran Red Crescent Med J, 2014, 16(9): e21458. | 
				                                                        
				                                                            
				                                                                | 18. | Kampmann U, Mosekilde L, Juhl C, et al. Effects of 12 weeks high dose vitamin D3 treatment on insulin sensitivity, beta cell function, and metabolic markers in patients with type 2 diabetes and vitamin D insufficiency-a double-blind, randomized, placebo-controlled trial. Metabolism, 2014, 63(9): 1115-1124. | 
				                                                        
				                                                            
				                                                                | 19. | Ryu OH, Lee S, Yu J, et al. A prospective randomized controlled trial of the effects of vitamin D supplementation on long-term glycemic control in type 2 diabetes mellitus of Korea. Endocr J, 2014, 61(2): 167-176. | 
				                                                        
				                                                            
				                                                                | 20. | Yousefi Rad E, Djalali M, Koohdani F, et al. The effects of vitamin D supplementation on glucose control and insulin resistance in patients with diabetes type 2: a randomized clinical trial study. Iranian J Publ Health, 2014, 43(12): 1651-1656. | 
				                                                        
				                                                            
				                                                                | 21. | Krul-Poel YH, Westra S, ten Boekel E, et al. Effect of vitamin D supplementation on glycemic control in patients with type 2 diabetes (SUNNY Trial): a randomized placebo-controlled trial. Diabetes Care, 2015, 38(8): 1420-1426. | 
				                                                        
				                                                            
				                                                                | 22. | Sadiya A, Ahmed SM, Carlsson M, et al. Vitamin D supplementation in obese type 2 diabetes subjects in Ajman, UAE: a randomized controlled double-blinded clinical trial. Eur J Clin Nutr, 2015, 69(6): 707-711. | 
				                                                        
				                                                            
				                                                                | 23. | Heshmat R, Tabatabaei-Malazy O, Abbaszadeh-Ahranjani S, et al. Effect of vitamin D on insulin resistance and anthropometric parameters in type 2 diabetes; a randomized double-blind clinical trial. Daru, 2012, 20(1): 10-15. | 
				                                                        
				                                                            
				                                                                | 24. | Tabesh M, Azadbakht L, Faghihimani E, et al. Effects of calcium-vitamin co-supplementation on metabolic profiles in vitamin D insufficient people with type 2 diabetes: a randomised controlled clinical trial. Diabetologia, 2014, 57(10): 2038-2047. | 
				                                                        
				                                                            
				                                                                | 25. | Sugden JA, Davies JI, Witham MD, et al. Vitamin D improves endothelial function in patients with Type 2 diabetes mellitus and low vitamin D levels. Diabet Med, 2008, 25(3): 320-325. | 
				                                                        
				                                                            
				                                                                | 26. | Jafari T, Faghihimani E, Feizi A, et al. Effects of vitamin D-fortified low fat yogurt on glycemic status, anthropometric indexes, inflammation, and bone turnover in diabetic postmenopausal women: A randomised controlled clinical trial. Clin Nutr, 2016, 35(1): 67-76. | 
				                                                        
				                                                            
				                                                                | 27. | Jorde R, Figenschau Y. Supplementation with cholecalciferol does not improve glycaemic control in diabetic subjects with normal serum 25-hydroxyvitamin D levels. Eur J Nutr, 2009, 48(6): 349-354. | 
				                                                        
				                                                            
				                                                                | 28. | Eftekhari MH, Akbarzadeh M, Dabbaghmanesh MH, et al. Impact of treatment with oral calcitriol on glucose indices in type 2 diabetes mellitus patients. Asia Pac J Clin Nutr, 2011, 20 (4): 521-526. | 
				                                                        
				                                                            
				                                                                | 29. | Witham MD, Dove FG, Dryburgh M, et al. The effect of different doses of vitamin D3 on markers of vascular health in patients with type 2 diabetes: a randomized controlled trial. Diabetologia, 2010, 53(10): 2112-2119. | 
				                                                        
				                                                            
				                                                                | 30. | Shab-Bidar S, Neyestani TR, et al. Regular consumption of vitamin D-fortified yogurt drink (Doogh)improved endothelial biomarkers in subjects with type 2 diabetes: a randomized double-blind clinical trial. BMC Med, 2011, 9(47): 125-134. | 
				                                                        
				                                                            
				                                                                | 31. | 周潔, 陳海燕, 王哲, 等.補充維生素D對2型糖尿病患者胰島素抵抗的影響.中華醫學雜志, 2014, 94(43): 3407-3410. | 
				                                                        
				                                                            
				                                                                | 32. | Nikooyeh B, Neyestani TR, Farvid M, et al. Daily consumption of vitamin D-or vitamin D +calcium-fortified yogurt drink improve glycemic control in patients with type 2 diabetes: a randomized clinical trial. Am J Clin Nutr, 2011, 93(4): 764-771. | 
				                                                        
				                                                            
				                                                                | 33. | Al-Zahrani MK, Elnasieh AM, Almansour FM, et al. A 3-month oral vitamin D supplementation marginally improves diastolic blood pressure in Saudi patients with type 2 diabetes mellitus. Int J Clin Exp Med, 2014, 7(12): 5421-5428. | 
				                                                        
				                                                            
				                                                                | 34. | Nigil Haroon N, Anton A, John J, et al. Effect of vitamin D supplementation on glycemic control in patient with type 2 diabetes: a systematic review of interventional studies. J Diabetes Metab Disord, 2015, 14(1): 1-11. | 
				                                                        
				                                                            
				                                                                | 35. | Mauss D, Jarczok MN, Hoffmann K, et al. Association of vitamin D levels with type 2 diabetes in older working adults. Int J Med Sci, 2015, 12(5): 362-368. | 
				                                                        
				                                                            
				                                                                | 36. | Aloia JF, Patel M, Dimaano R, et al. Vitamin D intake to attain a desired serum 25-hydroxyvitamin D concentration. Am J Clin Nutr, 2008, 87(6): 1952-1958. | 
				                                                        
				                                                            
				                                                                | 37. | Reis JP, Michos ED, Selvin E, et al. Race, vitamin D–binding protein gene polymorphisms, 25-hydroxyvitamin D, and incident diabetes: the Atherosclerosis Risk in Communities (ARIC) Study. Am J Clin Nutr, 2015, 101(6): 1232-1240. | 
				                                                        
				                                                            
				                                                                | 38. | Moore CE, Radcliffe JD, Liu Y, et al. Vitamin D intakes of adults differ by income, gender and race/ethnicity in the USA, 2007 to 2010. Public Health Nutr, 2014, 17(4): 756-763. | 
				                                                        
				                                                            
				                                                                | 39. | Stadlmayr A, Aigner E, Huber-Sch?nauer U, et al. Relations of vitamin D status, gender and type 2 diabetes in middle-aged Caucasians. Acta Diabetol, 2015, 52(1):39-46. | 
				                                                        
				                                                            
				                                                                | 40. | Parik SJ, Edelman M, Uwaifo GI, et al. The relationship between obesity and serum 1, 25-dihydroxy vitamin D concentrations in healthy adults. J Clin Endocrinol Metab, 2004, 89(3): 1196-1199. | 
				                                                        
				                                                            
				                                                                | 41. | Wortsman J, Matsucka LY, Chen TC, et al. Decreased bioavailability of vitamin D in obesity. Am J Clin Nutr, 2000, 72(3): 690-693. | 
				                                                        
				                                                            
				                                                                | 42. | 王芳田, 冬梅, 童平, 等.老年2型糖尿病患者血清25羥維生素D與能量代謝關系的研究.中國糖尿病雜志, 2013, 21(8): 709-712. | 
				                                                        
				                                                            
				                                                                | 43. | Liu S, Song Y, Ford ES, et al. Dietary calcium, vitamin D, and the prevalence of metabolic syndrome in middle-aged and older U.S. Women. Diabetes Care, 2005, 28(12): 2926-2932. | 
				                                                        
				                                                            
				                                                                | 44. | Reinbothe TM, Alkayyali S, Ahlqvist E, et al. The human L-type calcium channel Cav1.3 regulates insulin release and polymorphisms in CACNA1D associate with type 2 diabetes. Diabetologia, 2013, 56(2): 340-349. |