Please answer a question about the following article about Washington University in St. Louis:

Washington University supports four major student-run media outlets. The university's student newspaper, Student Life, is available for students. KWUR (90.3 FM) serves as the students' official radio station; the station also attracts an audience in the immediately surrounding community due to its eclectic and free-form musical programming. WUTV is the university's closed-circuit television channel. The university's main student-run political publication is the Washington University Political Review (nicknamed "WUPR"), a self-described "multipartisan" monthly magazine. Washington University undergraduates publish two literary and art journals, The Eliot Review and Spires Intercollegiate Arts and Literary Magazine. A variety of other publications also serve the university community, ranging from in-house academic journals to glossy alumni magazines to WUnderground, campus' student-run satirical newspaper.

What is the official student radio station at Washington University?
KWUR (90.3 FM)