N. Coronel Restrepo, M. Mejía Zuluaga, N. Aristizabal, and J. L. Torres Grajales, “Refractory Hypokalemia as a Clinical Manifestation of Ectopic Cushing Syndrome: A Report of Two Cases and a Review of the Literature”, Rev.ACE, vol. 6, no. 1, pp. 42–50, Mar. 2019.