Bioavailability of food iron-(59Fe), vitamin B12-(60Co) and protein bound selenomethionine-(75Se) in pancreatic exocrine insufficiency due to cystic fibrosis.

The absorption of biosynthetically 59Fe-labeled hemiglobin, pork and hog liver, 60 Co-vitamin 
B12 and 75Se-selenomethionin labeled pork was measured in children with cystic 
fibrosis by whole body counting of the absorbed radionuclides within the 
4-pi geometry of a large volume radioactivity detector with liquid organic 
scintillator. 