CBLB and homocystinuria: By diagnosis, at least one condition was present in 9 of 27 patients with PKU, 5 of 24 with MCADD, 5 of 10 with VLCADD, all 4 patients with MMA, all 3 with ASA, 2 of 2 for each of Cobalamin C deficiency, homocystinuria, and GA1, and 1 of 1 for each of MMA-CblB, LCHAD, IVA, PA, and HT1.