Where has Wenxiong Chen previously held positions?
Wenxiong Chen has previously held positions at Missouri State University, University of California, Los Angeles, University of Arizona, and University of Pennsylvania.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Where has Wenxiong Chen previously held positions?

### Input: Not applicable

### Response:
Wenxiong Chen has previously held positions at Missouri State University, University of California, Los Angeles, University of Arizona, and University of Pennsylvania.<|im_end|>