Some examples and use cases from the internet:

Some examples and use cases from the internet:

• PAUL COLLARD. Paul Collard is an expert in the use of creativity and culture to drive social and economic change, and to boost organisational performance.
• Dr. Dowdell is an expert in the use of social media by teens and the health risks posed by their online behaviors. She can address how risky online behaviors ...
• Mr. Scott is an expert in the use of multivariate statistical methods to identify sources of chemicals in indoor dust, soil, sediment, air, surface water, biota, human ...
• Alice Chuang, MD is an assistant professor in the Department of Obstetrics and Gynecology and is an expert in the use of 4D technology in GYN ultrasound, ...

• an expert on viruses. an expert on treating diabetes. In is also often used in the same way but is slightly less common. Both on and in are correct. However, there  ...
• This article needs attention from an expert on the subject. Please add a reason or a talk parameter to this template to explain the issue with the article. Consider ...
• Apr 16, 2013 ... While I say I am not an expert on the brain and brain diseases, I am just about as much an expert on that as I am on the other branches of the ...
• Mar 27, 2008 ... ''I'm an expert on digital cameras'' or ''I'm an expert at digital cameras'' Is it ''be an expert on sth'' or 'be an expert at sth'' What about if it is an ...