1. Ng PC: The fetal and neonatal hypothalamic-pituitary-adrenal axis. Arch Dis Child Fetal Neonatal Ed 2000, 82:F250–F254.
2. Valdes-Dapena MA: Histology of the Fetus and Newborn. Philadelphia, PA: Saunders; 1979.
3. Sadler TW, Langman J: Langman’s Medical Embryology, edn 11. Philadelphia, PA: Wolters Kluwer Lippincott Williams & Wilkins; 2010.
4. Schoenwolf GC, Larsen WJ: Larsen’s Human Embryology, edn 4. Philadelphia, PA: Elsevier/Churchill Livingstone; 2009.
5. Dasen JS, O’Connell SM, Flynn SE, et al.: Reciprocal interactions of Pit1 and GATA2 mediate signaling gradient-induced determination of pituitary cell types. Cell 1999, 97:587–598.