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Clemens, T.L., Henderson, S.L., Adams, J.S. and Holick, M.F. (1982) Increased Skin Pigment Reduces the Capacity of Skin to Synthesise Vitamin D3. The Lancet, 319, 74-76.
https://doi.org/10.1016/s0140-6736(82)90214-8

has been cited by the following article:

• TITLE: Spectrum of Vitamin D Deficiency across GFR Levels in a Senegalese Cohort

  AUTHORS: Modou Ndongo, Demba Makalou, Ibrahima Lyra Sarr, Baratou Coundoul, Babacar Mbodj, Babacar Fall, Mame Cheikh Seck, Sidy Mohamed Seck

  KEYWORDS: Vitamin D Deficiency, Kidney Dysfunction, Senegal

  JOURNAL NAME: Open Journal of Nephrology, Vol.16 No.2, May 22, 2026

  ABSTRACT: The optimal serum concentration of vitamin D for bone and mineral homeostasis remains debated and few data are available in sub-Saharan Africa. We conducted a cross-sectional study between February 2022 and April 2025 at the Ouakam Military Hospital biochemistry laboratory to assess the prevalence of vitamin D deficiency and its relationship with renal function in adults referred for vitamin D testing at a tertiary hospital laboratory in Dakar, Senegal. All patients aged ≥ 18 years undergoing serum vitamin D testing were included. Vitamin D deficiency was defined as 25(OH)-vitamin D