The relationship between migraine with aura, ischemic stroke, and patent foramen ovale remains not entirely clear and it is possible that it may be relevant in a subset of patients [122].
But the ground truth remains the same, it is not possible to find accurate labels for all kinds of data easily from the Internet or easily from nature to conduct experiments on.
The otocyst in null mice remains cystic and it is not possible to identify the relevant cell types.
Although PJVK protein has been localized in hair cells, supporting cells and spiral ganglion neurons, its function remains unknown; thus, it is not possible to suggest any mechanisms underlying AN in patients with mutations in the PJVK gene.
In CMAs, the walk-through remains relevant; however, it is not possible to respect the patients' route strictly, because of social sensitivities: starting the evaluation visit with the ambulance drivers, even if they are the patients' first contact with the CMA, is not acceptable to the health workers.
Although experimental determination of vapor pressures remains an option, often it is not possible to measure vapor pressure data experimentally for toxic or yet to be synthesized molecules.
It has rejected claims that it is simply "against" foreigners, arguing that it is in favour of a sensible "managed" migration policy, something Mr Farage argues is not possible while Britain remains in the EU.
It has rejected claims by cabinet minister Ken Clarke and others that it is simply "against" foreigners, arguing that it is in favour of a sensible "managed" migration policy, something Mr Farage argues is not possible while Britain remains in the EU.
Others -- like Assistant Secretary of State Arturo Valenzuela - blame Cuba for continuing to detain Alan Gross, saying action on liberalizing policy is not possible while he remains in prison.
When IPV is used, reversion is not possible but there remains a small risk of clinical infection upon exposure to reverted OPV or wild polio virus.
