Sentence examples for sometimes difficult to establish from inspiring English sources

A preoperative diagnosis of bile duct carcinoma in CBD is sometimes difficult to establish [16].

When hemorrhage is secondary to cerebral venous sinus thrombosis (CVST) the diagnosis is sometimes difficult to establish.

The diagnosis of rheumatoid arthritis (RA) is sometimes difficult to establish early in the disease process, particularly in the absence of its classic hallmarks.

However, the effectiveness of CMS is sometimes difficult to establish, for which unique strain sensitivities has been attributed as one contributing factor.

It is sometimes difficult to establish if headache is related to the disease or not.

However, such a distinction is sometimes difficult to establish, since in some interventions designed for groups individuals received considerable attention (e.g. by screening, individual counselling after the session, etc).

The British Bankers Association which chairs the joint money laundering steering group, said yesterday it was sometimes notoriously difficult to establish the beneficial owners of accounts.

Fabricated baits have shown promise for increased selectivity when longlining, but it has sometimes been difficult to establish whether low cod catch rates with fabricated baits have resulted from bait selectivity or from a low abundance of cod in the area.

Indeed, it seems sometimes particularly difficult to establish effective communication between groups working in different disciplines.

The two worked closely together and labeled some of their early work with joint credit lines, sometimes making it difficult to establish authorship conclusively, Mr. Wallis said.

In fact, sometimes, it is difficult to establish invariants using variables corresponding to places or tokens.