Pushing the Boundaries of Biomarker Discovery in Phenylketonuria: Metabolomic Profiling Reveals Novel Biomarkers and Their Associations with Phenylalanine. - AlMalki, Reem; Aleidi, Shereen M.; Al Mogren, Maha; Almohsen, Shaima; Sumaily, Khalid M.; Alfares, Ahmed; Rahman, Anas M. Abdel (Molecules, 2026)