RT Journal Article SR Electronic T1 Comparison of the effect of 1000 and 10000 units heparin on umbilical venous blood gases JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 208 OP 209 VO 31 IS 2 A1 Ahmad S. Farhat A1 Ashraf Mohammadzadeh A1 Rana Amiri A1 Mehvar Amiri YR 2010 UL http://smj.org.sa/content/31/2/208.abstract AB