Schedin-Weiss Schedin-Weiss S. S. Glycan biomarkers for Alzheimer disease correlate with T-tau and P-tau in cerebrospinal fluid in subjective cognitive impairment Glycan biomarkers for Alzheimer disease correlate with T-tau and P-tau in cerebrospinal fluid in subjective cognitive impairment . Here, MAPT is linked to early-onset autosomal dominant Alzheimer disease.