Elemam, Omima, Seham Abdelkhalek, Doaa Abdelmoety, Reem Baraka, and Mervat Yousef. “Multiple Primary Tumours, How Frequent We Can Offer Curative Therapy?”. Asian Pacific Journal of Cancer Care 5, no. 2 (June 7, 2020): 71-78. Accessed October 18, 2021. http://waocp.com/journal/index.php/apjcc/article/view/354.