haʊˈɛvɚ, ɐ smˈɔːl nˈʌmbɚɹ ʌv ˌɛpɪdˌɜːmˈɑːləsˌɪs bʊlˈoʊsə sˈɪmplɛks pˈeɪʃənts duːnˌɑːt hæv mjuːtˈeɪʃənz ɪn ðɛɹ kˌeɪˌɑːɹtˈiː fˈaɪv ænd kˌeɪˌɑːɹtˈiː fˈoːɹtiːn dʒˈiːnz.
However, a small number of epidermolysis bullosa simplex patients do not have mutations in their KRT5 and KRT14 genes.