PLP1 and autism spectrum disorder: Several significant age-related proteins mapped to known neurodevelopmental genetic risk loci, including genetic loci implicated in autism spectrum disorder (ASD) (ANK2, YWHAE, L1CAM, FABP5, NRCAM), intellectual disability (L1CAM, PLP1, PSAP, QDPR), and schizophrenia (NCAN, ALCAM, GNAO1, PSAP, NFASC).