1. Sadler TW. Langman’s medical embryology, vol. 1. Lippincott Williams & Wilkins; 2006.
2. Moore KL. Before we are born: essentials of embryology and birth defects. 8th ed. Elsevier; 2012.
3. Lockshin RA, Zakeri Z. Cell death in health and disease. J Cell Mol Med. 2007;11(6):1214–24.
4. Rubin R, Strayer DS, Rubin E. Rubin’s pathology: clinicopathologic foundations of medicine. 6th ed. Philadelphia: Lippincott, Williams & Wilkins; 2012.
5. Kumar V, Abbas AK, Fausto N, Aster J. Robbins and Cotran pathologic basis of disease. 8th ed. Elsevier Saunders; 2012.