It was shown that CAG repeat length was associated with none of the proteins but GGC repeat length was slightly associated with kallikrein-related peptidase 3 (KLK3; beta, −0.04; corrected P value, 2 × 10−3; same as below) also known as an established tumor marker, prostate-specific antigen (PSA) (10). The gene discussed is KLK3; the disease is neoplasm.