“Time course of 25(OH)D3 vitamin D3 as well as PTH (parathyroid hormone) during fracture healing of patients with normal and low bone mineral density (BMD)” [1], the last name of Christoph Wölfl was incorrectly spelt as Wöfl. In addition, the first name of Prof. Schmidt-Gayk was incorrectly listed as Gerhard rather than Heinrich. These errors have now been corrected above.