Maryam Qussay Issa, Shatha MJ AL-Khateeb, Hala Sameh Arif and Muhi Kadhem AL-Janabi 2019. The validity of carbohydrate antigen 19-9 in serum and saliva as a new type for diagnosis in Iraqi kids having cystic fibrosis. International Journal of Research in Pharmaceutical Sciences. 10, 2 (May 2019), 1440–1443.