( January 31, 2025, 2:08 PM EST) -- CHICAGO — Companies sued over allegations that their hair relaxer products XE "hair relaxer products" contain toxic chemicals XE "toxic chemicals" have filed a brief in the multidistrict litigation for product injury claims in Illinois federal court arguing that the plaintiffs “cannot carry their burden to justify” their request to redact their mental health history from medical records in the case because the psychotherapy-patient privilege does not apply....