Jesus christ, a premed with 13 pubs. You're either a troll or you're going to be an incredible applicant (as long as your other stats are good). 13 pubs is probably right around or higher than the average amount of pubs people applying into things like Derm/ENT/Ortho etc. have. So great work!
To answer your question, I'd put it all in one publication tab. If you have more spots for activities, then split it into categories.
Kevin W, MCAT Tutor
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