36. Vestergaard EM; Hein HO; Meyer H; Grunnet N; Jørgensen J; Wolf H et al. Reference values and biological variation for tumor marker CA 19-9 in serum for different Lewis and Secretor genotypes and evaluation of Secretor and Lewis genotyping in a Caucasian population. Clinical Chemistry. 1999; 45: 54-61.
37. Henry S, Oriol R, Samuelsson B. Lewis histo-blood group system and associated secretory phenotypes. Vox Sang. 1995; 69:166-82.
38. Kelly, R.; Rouquier, S.; Giorgi, D.; Lennon, G. Lowe I. Sequence and expression of a candidate for the human secretor blood group α(1,2)fucosyltransferase gene (FUT2). Homozygosity for an enzyme-inactivating nonsense mutation commonly correlates with the non-secretor phenotype. J Biol Chem.1995; 270(9): 4640-649.
39. Garraty G. Association of blood groups and disease: blood groups in hematologic malignacies. Cancer Genet Cytogenet. 1991; 51(1):113-20.
40. Moreno, A.; Campi, C.; Escovich, L.; García Borrás, S.; Racca, L.; Racca, A.; Cotorruelo, C. & Biondi. C.. Analysis of the FUT2 gene and Secretor status in patients with oral lesions. Inmunología. 2009; 28(3):131-34.
41. Narimatsu H.; Iwasaki H.; Nishihara S.; Kimura H.; Kudo T., Yamauchi Y, et al. Genetic evidence for the Lewis enzyme, which synthesizes type-1 Lewis antigens in colon tissue, and intracellular localization of the enzyme. Cancer Res. 1996; 56(2):330–38
42. Onizawa K; Nishihara K; Yamagata K; Yusa H, Yanagawa, T, Yoshida, H. (2003). Factors associated with diagnostic delay of oral squa¬mous cell carcinoma. Oral Oncoly. 2003; 39(8):781-88.
43. Harduin-Lepers A, Vallejo-Ruiz V, Krzewinski-Recchi MA, Samyn-Petit B, Julien S, Delannoy P. The human sialyltransferases family. Biochemie. 2001; 83:727-37.
44. Travig C, Schauer. Structure, function and metabolism of sialic acids. Cell Mol Life Sci. 1998; 54:1330-49.
45. Dall’Olio F. The sialyl-alpha2,6-lactosaminylstructure: biosynthesis and functional role. Glycoconj J. 2000; 17:669-76.
46. Dall’Olio F, Chiricolo M Sialyltransferases in cancer. Glycoconj J. 2001; 18:841-50.
47. Abdul Wahab R. Hamad,Nazar G.A. Talabani, Fawaz Al-Swad. Evaluation of lipid-bound sialic acid tumor marker in sera of acute lymphocytic (ALL) patients. J Bagh College of Dentistry 2008. 20(1):28,30.
48. Hudson D; Speight P, Watt, F. Altered expression of CD44 isoforms in squamous-cell carcinomas and cell lines derived from them. Int J Cancer. 1996; 66,(1):457-463,
49. Marhaba R, Zöller M. CD44 in cancer progression: adhesion, migration and growth regulation. J Mol Histol. 2004; 35(3): 211-31.
50. Otavia L; Caballero .L; de Souza S; Bretani R, Simpson A. Alternative spliced transcripts as cancer markers. Dis. Markers. 2001; 17(2,):67-75