Among the respondents, 27 (33.3%) had PKU, 24 (29.6%) had MCADD, 10 (12.3%) had VLCADD, 4 (5.0%) had MMA due to methylmalonyl-CoA mutase deficiency (MMA-mut), 3 (3.7%) had ASA, 2 (2.5%) each had Cobalamin C deficiency, Citrullinemia type 1, Homocystinuria, or GA1, and 1 (1.2%) each had LCHADD, IVA, PA, HT1 1, or MMA caused by cobalamin B deficiency (MMA-CblB). The gene discussed is CBLB; the disease is methylmalonic aciduria and homocystinuria type cblC.