Animals in groups 1 and 2 were sacrificed within approximately 3 weeks because of the formation of intractable esophageal stricture.
A few months ago, two patients from the group of conservative treatment have undergone PD because of persistent intractable pain and ineffective analgesia and severe changes of the orthotopic pancreas, and one patient was moved to the group of draining procedures because of jaundice; hence, she is scheduled for PD as well.
Because of the high potential for intractable confounding and reverse causation, cross-sectional studies were excluded.
One could argue that even "Curb Your Enthusiasm" has a moral core: it's a lampoon about an ultra-privileged white Westerner who desperately wants to be seen as a good person but whose attempts at the most basic politeness explode because of his intractable selfishness, his inability to acknowledge that other people exist.
California was of particular interest, not only because it constitutes the world's ninth-largest economy, but because of its intractable fiscal problems.
I will not want to hear that problems are intractable because of the language of the law".
But corruption, from a booming black market in oil and cigarettes to bribery of officials, remains almost intractable because of the tightknit, clannish nature of Georgia and because some of those involved are longtime associates of the president and he remains loyal to them.
However, model checking of distributed algorithms is often intractable because of the state-explosion problem.
However, the resulting model is still computationally intractable because of the integrality restrictions and large size of the model.
