Email after an interview?

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Who should you be emailing after a day of interviews? I also had questions for one professor but did not get the chance to speak to them. Should I email that professor as well with my questions?
 
Email the people you spoke to and anyone you genuinely wanted to talk to or ask questions and didn't have the opportunity.
 
I typically emailed the training director and any supervisors/faculty members who interviewed me. If you have questions it doesn't hurt to email that person.
 
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