Vargas Gayón, M. R. .; Wilches, M. C. .; Estrada Orozco, K. . Radiography of Lumbosacral Column in Acute Lumbar Pain: Use or Overuse? Experience in the Emergency Service of Two High-Complexity Centers in Bogotá, Colombia. Rev. colomb. radiol. 2019, 30, 5126-5131.