While dictionaries all concur that confirm and corroborate are synonyms, my gut tells me that corroborate is more used in legal contexts and confirm in medical contexts. In academic writing (which I happen to know you are engaged in) it is no bad thing to adhere to the conventional expressions. Scholarly papers in the medical sciences are not less appreciated for using the common words and phrases. In fact, using the standard forms reduces the chance of readers misunderstanding you.
- For Teachers