1.   As intriguing as these results are, much remains unclear about the impact of low doses of alcohol on the immune sys-tem.

2.   But it remains unclear how far the plan will go in dismantling an entrenched system.

3.   However the research has been of variable quality, there are conflicting findings, and the full implications for practice remain unclear.

4.   However, the degree of severity of the indictment, which could range from negligent homicide to second-degree murder, remains unclear.

5.   Mr Greenspan is famously hard to interpret, and the motivation for his rate cut will no doubt remain unclear for now.

6.   Oki intends to leave a transition team in place until October though its function remains unclear.

7.   The barriers are clear enough, what remains unclear is why some people are able to surmount them when others fail miserably.

8.   The details remain unclear, but the scuffle is probably best described as potentially lucrative for Mr Tyler.

9.   The place of geriatric medicine within the new arrangements for the National Health Service also remains unclear.