1. I'm not clear what you mean by "refer back".
"Refer back" doesn't mean that.I used it instead of "went back to". It means I used to work with them. I went back to them to do another study.
"Refer back" doesn't mean that.
It works.Should I stick to "went back"?
Did you go back and work with them again on a new study (or a new piece of research) or did you simply contact them, after graduating, for a bit of help?
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