Abnormal performance on the PD test battery by asymptomatic first-degree relativesErwin B. Montgomery, William C. Koller, Kenneth B. Baker et al.|Neurology|1999Cited by 89
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Early detection of probable idiopathic Parkinson's disease: I. development of a diagnostic test batteryErwin B. Montgomery, Kelly Lyons, William C. Koller et al.|Movement Disorders|2000Cited by 70
Motor initiation and execution in essential tremor and Parkinson's diseaseErwin B. Montgomery, William C. Koller, Kenneth B. Baker et al.|Movement Disorders|2000Cited by 64
Issues in the early diagnosis of Parkinson's diseaseWilliam C. Koller, Erwin B. Montgomery|Neurology|1997Cited by 64