The combination of PCR and Southern blotting techniques facilitated the discovery of multiple genes associated with PN, including LIMP‐2 with complex neurological disorders, including peripheral demyelinating neuropathy, and SLC12A6 with agenesis of the corpus callosum with PN, in both murine and human models [16, 17, 18]. Here, SCARB2 is linked to poikiloderma with neutropenia.