"as to this question" is correct and can be used in written English.
Example: As to this question, I believe the answer is yes.
"As far as I can see," she said, "the international sources are simply silent as to this question".
Now as to this question, let me say, first, that I think the vice president and his wife love their daughter.
As to this question, we shall discuss it as presented in [10] in the forthcoming time.
Nonetheless, we provide new analysis in new Figure 5C to move as close to this question as possible using existing methods.
The issue of credibility emerged from our data as central to this question.
All other older trials are as well not applicable to this question as they did not use standardized treatment for AE-COPD including systemic corticosteroids.
There are almost as many answers to this question as there are comparative philosophers working in the field of Chinese thought.
As to the question of why this should occur only at mid-latitudes, the answer at this point would be mere speculation.
We gave much agonized thought to this question, as well as to the question, How can we provoke such a response from the Islamic world?
We aim to provide definitive answers to this question as well as identifying the characteristics of successful partnerships.
The same improvised movie that Elizabeth McGovern gave as her answer to this question.
