18. Bannuru RR et al. (2016) Comparative safety profile of hyaluronic acid products for knee osteoarthritis: a systematic review and network meta-analysis. Osteoarthritis Cartilage 2016 Dec; 24(12): 2022–2041.
19. Debbi EM et al. (2011) Efficacy of methylsulfonylmethane supplementation on osteoarthritis of the knee: a randomized controlled study. BMC Complement Altern Med. Jun 27; 11:50.
20. Benito-Ruiz P et al. (2009): A randomized controlled trial on the efficacy and safety of a food ingredient, collagen hydrolysate, for improving joint comfort. Int J Food Sci Nutr. 60 Suppl 2: 99–113.
21. Manoy P et al. (2017) Vitamin D Supplementation Improves Quality of Life and Physical Performance in Osteoarthritis Patients. Nutrients. Jul 26; 9(8). pii: E799.
22. Gao XR et al. (2017) The effect of vitamin D supplementation on knee osteoarthritis: A meta-analysis of randomized controlled trials. Int J Surg Oct; 46: 14–20.
23. Gruenwald J et al. (2009) Effect of glucosamine sulfate with or without omega-3 fatty acids in patients with osteoarthritis. Adv Ther. Sep; 26(9): 858–71.
24. Guilak F et al. (2014) Dietary fatty acid content regulates wound repair and the pathogenesis of osteoarthritis following joint injury. Ann Rheum Dis. 2015 Nov; 74(11): 2076–2083. Published online 2014 Jul 10.
25. Rein E et al. (2004). A herbal remedy made from a subspecies of rose-hip Rosa canina, reduces symptoms of knee and hip osteoarthritis. Osteoarthritis Cartilage 12 (Suppl. 2): 80.
26. Warholm O et al. (2003). The Effects of a Standardized Herbal Remedy Made from a Subtype of Rosa canina in Patients with Osteoarthritis: A Double-Blind, Randomized, Placebo-Controlled Clinical Trial. Curr Ther Res Clin Exp. Jan; 64(1): 21–31.
27. Cisár P et al. (2008) Effect of pine bark extract (Pycnogenol) on symptoms of knee osteoarthritis. Phytother Res. Aug; 22(8): 1087–92.
28. Belcaro G et al. (2008) Treatment of osteoarthritis with Pycnogenol. The SVOS (San Valentino Osteo-arthrosis Study). Evaluation of signs, symptoms, physical performance and vascular aspects. Phytother Res. Apr; 22(4): 518–23.
29. Jamison RN et al. (1995) Weather changes and pain: perceived influence of local climate on pain complaint in chronic pain patients. Pain May; 61(2): 309–15.
30. Otto-Lambertz C et al. (2017) Periprothetische Infektionen beim Gelenkersatz. Deutsches Ärzteblatt; 114: 374–353.
31. Trampuz A. et al. (2015) Management periprothetischer Infektionen des Kniegelenks. Der Orthopäde, Springer-Verlag Heidelberg.
32. Wollmerstedt N et al. (2006) Aktivitätsmessung von Patienten mit Hüfttotalendoprothesen. Der Orthopäde Volume 35, Issue 12, 1237–1245.
33. Zeggini E et al. (2019) Identification of new therapeutic targets for osteoarthritis through genome-wide analyses of UK Biobank data. Nature Genetics Volume 51, 230–236.
34. Thaller PH et. al. (2018) O-Beine und intensives Fußballtraining im Wachstumsalter Systematisches Review und Metaanalyse. Deutsches Ärzteblatt; 115: 401–408.
35. De Cock L et al. (2018) Knee alignment in adolescents is correlated with participation in weight-bearing sports. International Orthopaedics; Volume 42, Issue 12, 2851–2858.