1. Khabbazi A, Hajialiloo M, Kolahi S, et al. A multicenter study of clinical and laboratory findings of palindromic rheumatism in Iran. International Journal of Rheumatic Diseases 2012; 15(4):427-430. [DOI:10.1111/j.1756-185X.2012.01739.x]

2. Iyer VR, Cohen GL. Palindromic rheumatism. Southern Medical Journal 2011; 104(2): 147-149. [DOI:10.1097/SMJ.0b013e318200c4cc]

3. Sanmartí R, Frade-Sosa B, Morl'a R, et al. Palindromic rheumatism: just a pre-rheumatoid stage or something else?. Frontiers in Medicine 2021; 8: 657983. [DOI:10.3389/fmed.2021.657983]

4. Charoenngam N, Shirvani A, Holick MF. Vitamin D for skeletal and non-skeletal health: What we should know. Journal of Clinical Orthopaedics and Trauma 2019; 10(6): 1082-1093. [DOI:10.1016/j.jcot.2019.07.004]

5. Martens PJ, Gysemans C, Verstuyf A, Mathieu C. Vitamin D's Effect on Immune Function. Nutrients 2020; 12(5): 1248. [DOI:10.3390/nu12051248]

6. Lemire JM, Archer DC, Beck L, Spiegelberg HL. Immunosuppressive Actions of 1,25-Dihydroxyvitamin D3: Preferential Inhibition of Th1 Functions. Journal of Nutrition 1995; 125(6 Suppl): 1704S-1708S. [DOI:10.1016/0960-0760(95)00106-A]

7. Boonstra A, Barrat FJ, Crain C, et al. 1α,25-Dihydroxyvitamin D3 Has a Direct Effect on Naive CD4; T Cells to Enhance the Development of Th2 Cells. Journal of Immunology 2001; 167(9): 4974-4980. [DOI:10.4049/jimmunol.167.9.4974]

8. Kongsbak M, Levring TB, Geisler C, von Essen MR. The vitamin D receptor and T cell function. Frontiers in Immunology 2013; 4: 148. [DOI:10.3389/fimmu.2013.00148]

9. Rolf L, Muris AH, Hupperts R, Damoiseaux J. Illuminating vitamin D effects on B cells-The multiple sclerosis perspective. Immunology 2016; 147(3): 275-284. [DOI:10.1111/imm.12572]

10. Chen S, Sims GP, Chen XX, et al. Modulatory effects of 1,25-dihydroxyvitamin D3 on human B cell differentiation. Journal of Immunology 2007; 179(3): 1634-1647. [DOI:10.4049/jimmunol.179.3.1634]

11. Heine G, Niesner U, Chang HD, et al. 1,25-dihydroxyvitamin D(3) promotes IL-10 production in human B cells. European Journal of Immunology 2008; 38(8): 2210-2218. [DOI:10.1002/eji.200838216]

12. Yamamoto EA, Nguyen JK, Liu J, et al. Low Levels of Vitamin D Promote Memory B Cells in Lupus. Nutrients 2020; 12(2): 291. [DOI:10.3390/nu12020291]

13. Infante M, Ricordi C, Sanchez J, et al. Influence of Vitamin D on Islet Autoimmunity and Beta-Cell Function in Type 1 Diabetes. Nutrients 2019; 11(9): 2185. [DOI:10.3390/nu11092185]

14. Hajjaj-Hassouni N, Mawani N, Allali F, et al. Evaluation of Vitamin D Status in Rheumatoid Arthritis and Its Association with Disease Activity across 15 Countries: "The COMORA Study". International Journal of Rheumatic Diseases 2017; 2017: 5491676. [DOI:10.1155/2017/5491676]

15. Islam MA, Khandker SS, Alam SS, et al. Vitamin D status in patients with systemic lupus erythematosus (SLE): A systematic review and meta-analysis. Autoimmunity Reviews 2019; 18(11): 102392. [DOI:10.1016/j.autrev.2019.102392]

16. Sahebari M, Nabavi N, Salehi M. Correlation between serum 25(OH)D values and lupus disease activity: An original article and a systematic review with meta-analysis focusing on serum VitD confounders. Lupus 2014; 23(11): 1164-1177. [DOI:10.1177/0961203314540966]

17. Khabbazi A, Rashtchizadeh N, Ghorbanihaghjo A, et al. The status of serum vitamin D in patients with active Behcet's disease compared with controls. International Journal of Rheumatic Diseases. 2014; 17(4): 430-434. [DOI:10.1111/1756-185X.12153]

18. Cai G, Wang L, Fan D, et al. Vitamin D in ankylosing spondylitis: review and meta-analysis. Clinica Chimica Acta 2015; 438: 316-322. [DOI:10.1016/j.cca.2014.08.040]

19. An L, Sun MH, Chen F, Li JR. Vitamin D levels in systemic sclerosis patients: A meta-analysis. Drug Design, Development and Therapy 2017; 11: 3119-3125. [DOI:10.2147/DDDT.S144860]

20. Alibaz-Oner F, Asmaz-Haliloglu Ö, Gogas-Yavuz D, et al. Vitamin D Levels in Takayasu's Arteritis and a Review of the Literature on Vasculitides. Journal of Clinical Laboratory Analysis. 2016; 30(5): 529-533. [DOI:10.1002/jcla.21898]

21. Munger KL, Levin LI, Hollis BW, et al. Serum25-hydroxyvitamin D levels and risk of multiple sclerosis. Journal of the American Medical Association 2006; 296(23):2832-2838. [DOI:10.1001/jama.296.23.2832]

22. Franco AS, Freitas TQ, Bernardo WM, Pereira RMR. Vitamin D supplementation and disease activity in patients with immune-mediated rheumatic diseases: A systematic review and meta-analysis. Medicine (Baltimore). 2017; 96(23): e7024. [DOI:10.1097/MD.0000000000007024]

23. Guerne PA, Weisman MH. Palindromic rheumatism: part of or apart from the spectrum of rheumatoid arthritis. The American Journal of Medicine. 1992; 93(4): 451-460 [DOI:10.1016/0002-9343(92)90177-D]

24. Kavoosi H, Kamali K, Gharibdoost F. Analysis of vitamin D levels in patients with rheumatoid arthritis and its relation with the disease status. Journal of Advances in Medical and Biomedical Research 2012; 20(78): 57-64.

25. Noroozi M, Gholamzadeh-Baeis M. The Serum Level of Vitamin D and its Association with Disease Severity in Patients with Rheumatoid Arthritis. Journal of Isfahan Medical School. 2017; 34(405): 1311-1317.

26. Yazmalar L, Ediz L, Alpayci M, et al. Seasonal disease activity and serum vitamin D levels in rheumatoid arthritis, ankylosing spondylitis and osteoarthritis. African Health Sciences 2013; 13(1): 47-55. [DOI:10.4314/ahs.v13i1.7]

27. Sahebari M, Mirfeizi Z, Rezaieyazdi Z, et al. 25(OH) vitamin D serum values and rheumatoid arthritis disease activity (DA S28 ESR). Caspian Journal of Internal Medicine 2014; 5(3): 148-155.

28. Costenbader KH, Feskanich D, Holmes M, et al. Vitamin D intake and risks of systemic lupus erythematosus and rheumatoid arthritis in women. Annals of the Rheumatic Diseases 2008; 67(4): 530-535. [DOI:10.1136/ard.2007.072736]

29. Borukar SC, Chogle AR, Deo SS. Relationship between Serum 25-Hydroxyvitamin D Levels, Disease Activity and Anti-Cyclic Citrullinated Peptide Antibody Levels in Indian Rheumatoid Arthritis Patients. Journal of Rheumatic Diseases and Treatment 2017; 3(3): 056. [DOI:10.23937/2469-5726/1510056]

30. Durmus B, Altay Z, Baysal O, Ersoy Y. Does vitamin D affect disease severity in patients with ankylosing spondylitis?. Chinese Medical Journal 2012; 125 (14): 2511-2515.

31. Elamir A, Ibrahim T, Fouad NA, Masoud M. Serum Vitamin D levels in Rheumatoid arthritis and Relationship with disease activity. 2022; 38(2): 175-184. [DOI:10.21608/besps.2018.8206]

32. Turhanoglu AD, Guler H, Yonden Z, et al. The relationship between vitamin D and disease activity and functional health status in rheumatoid arthritis. Rheumatology International 2011; 31(7): 911-914. [DOI:10.1007/s00296-010-1393-6]

33. Esalatmanesh K, Taghadosi M, Arj A, et al. Relevance of serum vitamin D level and the disease activity in rheumatoid arthritis. Feyz, Journal of Kashan University of Medical Sciences 2011; 14(4): 414-419.

34. Mermerci BB, Pekin DY, Sivas F, et al, The relation between osteoporosis and vitamin D levels and disease activity in ankylosing spondylitis. Rheumatology International 2010; 30(3): 375-381. [DOI:10.1007/s00296-009-0975-7]

35. Kolahi S, Khabbazi A, Kazemi N, Malek Mahdavi A. Does vitamin D deficiency contribute to higher disease activity in patients with spondyloarthritis?. Immunology Letters 2019; 212: 1-5. [DOI:10.1016/j.imlet.2019.06.005]

36. Erten S, Kucuksahin O, Sahin A, et al. Decreased plasma vitamin D levels in patients with undifferentiated spondyloarthritis and ankylosing spondylitis. Internal Medicine 2013; 52(3): 339-344. [DOI:10.2169/internalmedicine.52.9047]

37. Lange U, Teichmann J, Strunk J, et al. Association of 1.25 vitamin D3 deficiency, disease activity and low bone mass in ankylosing spondylitis. Osteoporosis International 2005; 16(12): 1999-2004. [DOI:10.1007/s00198-005-1990-5]

38. Arends S, Spoorenberg A, Bruyn GA, et al. The relation between bone mineral density, bone turnover markers, and vitamin D status in ankylosing spondylitis patients with active disease: a crosssectional analysis. Osteoporosis International 2011; 22(5): 1431-1439. [DOI:10.1007/s00198-010-1338-7]

39. Guła Z, Kopczyńska A, Hańska K, et al. Vitamin D serum concentration is not related to the activity of spondyloarthritis- preliminary study. Reumatologia 2018; 56(6): 388-391. [DOI:10.5114/reum.2018.80717]

40. Hajialilo M, Noorabadi P, Tahsini Tekantapeh S, Malek Mahdavi A. Endothelin‑1, α‑Klotho, 25(OH) Vit D levels and severity of disease in scleroderma patients. Rheumatology International 2017; 37(10): 1651-1657. [DOI:10.1007/s00296-017-3797-z]