Researchers are often asked to write references or recommendation letters. Nature asked three senior scientists what they do when they can’t endorse someone. I’m a neuroscientist in the United States.

The graduate application allows applicants to select up to two graduate campuses and/or majors per application. If you are applying to more than one graduate program, we highly suggest you contact ...

We require two (2) letters of recommendation, uploaded by your letter authors to PostBacCAS. Please provide your letter authors with our Guidelines for Writing Compelling Letters of Recommendation.