Its an abstract so it doesn't have a pub med ID but will be published in the journal (yes this is possible). I did not write about it in my primary application. I will be presenting the poster.
I am wondering how to actually structure the update. I don't know what the conventions are for mentioning publications in a "letter" format, if that makes sense. Is it weird to explicitly mention the "first author" aspect since it is apparent in the authorship order?