Millat et al. [203] performed genetic screening of 32 French SIDS victims of Caucasian origin for mutations in KCNQ1, KCNH2, SCN5A, KCNE1, and KCNE2. They found three potassium channel mutations, one in each of the genes KCNQ1, KCNH2, and KCNE1 (KCNQ1-G626S, KCNH2-R148W, and KCNE1-T20I) and none in KCNE2. These mutations were interpreted by the authors as a possible cause of death. Here, KCNH2 is linked to sudden infant death syndrome.