What has Dr. Andrew Christler focused on in his distinguished medical career?
Dr. Christler has focused on making advancements in laryngology care standards and exploring the role of neuroplasticity in helping patients regain vocal proficiency.
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### Instruction:
What has Dr. Andrew Christler focused on in his distinguished medical career?

### Input: Not applicable

### Response:
Dr. Christler has focused on making advancements in laryngology care standards and exploring the role of neuroplasticity in helping patients regain vocal proficiency.<|im_end|>