O o0rikio0o 10+ Year Member 5+ Year Member Sep 15, 2007 46 0 0 Status Apr 6, 2010 #1 so why are they retired? is it because they've been used for so long? the data is no longer true due to newer pharm, recommendations, technology (ie: Schilling test)? the question is not very good? or a combination of the above?