bᵻtwˌiːn tˈuː θˈaʊzənd nˈaɪn ænd hɪz dˈɛθ ɪn tˈuː θˈaʊzənd fˈɪftiːn, hiː sˈʌfɚd fɹʌm pɹəɡɹˈɛsɪv sˈuːpɹənˌuːklɪɹ pˈɔːlzi, ɐ ɹˈɛɹ dɪzˈiːz ɪnvˈɑːlvɪŋ nˌʊɹɹoʊddʒˌɛnɚɹˈeɪʃən.
Between 2009 and his death in 2015, he suffered from progressive supranuclear palsy, a rare disease involving neurodegeneration.