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'follow-up': [114], 'period,': [115], '11': [116], 'developed': [122, 135], 'new-onset': [123], 'parkinsonian': [124, 151, 244], 'features,': [125], 'without': [126], 'fulfilling': [127], 'criteria': [128, 140], 'for': [129, 141, 241], 'diagnosis': [131], '(ET+).': [132], 'Nine': [133], 'features': [137], 'meeting': [138], 'probable': [142], '(ET-PD).': [144], 'Patients': [145], 'ET-': [147], 'did': [148], 'not': [149], 'develop': [150], 'features.': [152], 'For': [153], 'each': [154], 'group,': [155, 174], 'maximum': [157, 209], 'size': [158], 'as': [165], 'follows:': [166], '5.62': [167], '±': [168, 176, 184, 192, 201], '5.40': [169], 'mm2': [170, 178, 186, 194, 203], 'control': [173], '19.02': [175], '14.27': [177], '9.15': [183], '11.26': [185], 'ET-,': [190], '20.05': [191], '13.78': [193], 'ET+': [198, 221], '20.13': [200], '13.51': [202], 'ET-PD.': [207], 'ET-PD': [208], 'values': [210, 217], 'significantly': [212], 'different': [213, 223], 'controls.': [215], 'Maximum': [216], 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