| However, the role of the brain stem and spinal cord in acupuncture remains unclear. |
| Whether this was discussed or not in his absence, was unclear till late in the evening. |
| It is also unclear if warnings or cautions were picked up as well as convictions. |
| The effect of the proline insertions on the linker stiffness is, however, unclear. |
| The causes of its extinction remain unclear, but it is likely that rats, weasels, and cats played a role in its demise. |
| Problems included unspecified dosages, unclear information about drug action, and side effects of drugs. |
