Lewerin C, Ljunggren Ö, Nilsson-Ehle H, Karlsson MK, Herlitz H, Lorentzon M, Ohlsson C, Mellström D. Low serum iron is associated with high serum intact FGF23 in elderly men: The Swedish MrOS study. Bone. 2017 May;98():1–8. doi: 10.1016/j.bone.2017.02.005. PMID: 28212898.