SLC52A2 and multiple acyl-CoA dehydrogenase deficiency: Mutations in Rf transporter 3 gene (SLC52A3)13 and Rf transporter 2 gene (SLC52A2),14 which have been shown to cause Brown–Vialetto–Van Laere or Fazio Londe syndromes, might lead to a MADD(‐like) biochemical profile (see Tolomeo and colleagues15, 16, 17).