ðˈʌs, ðə pˈæst hˈæfsˈɛntʃɚɹi hɐz sˈiːn ˌiːˌɛfˈiː ɪvˈɑːlv fɹʌm ɐ mɪstˈɪɹiəs bˌʌt fɹˈiːkwəntli əbzˈɜːvd dɪzˈiːz tʊ ɐ ɹˈɛɹ bˌʌt mˈʌtʃ bˈɛɾɚɹ ˌʌndɚstˈʊd ɹɪˈækʃən tə mˈɛni dɪzˈiːzᵻz ænd ˈʌðɚ stɹˈɛsᵻz.
Thus, the past half-century has seen EFE evolve from a mysterious but frequently observed disease to a rare but much better understood reaction to many diseases and other stresses.