El-Shafie, O. T., N. Al-Saffi, A. Al-Sajwani, and N. Woodhouse. “Adrenocorticotropic Hormone-Dependent Cushing’s Syndrome : Use of an Octreotide Trial to Distinguish Between Pituitary or Ectopic Sources”. Sultan Qaboos University Medical Journal, vol. 15, no. 1, Feb. 2015, pp. 120-3, https://journals.squ.edu.om/index.php/squmj/article/view/2000.