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Marras C, McDermott MP, Marek K, Rochon P, Naglie G, Tanner CM, Rudolph A, Shoulson I, Lang AE; Parkinson Study Group DATATOP and PRECEPT investigators.Marras C, et al.Mov Disord. 2011 Mar;26(4):608-13. doi: 10.1002/mds.23581. Epub 2011 Feb 1.Mov Disord. 2011.PMID: 21287602
Marras C, Andrews D, Sime E, Lang AE.Marras C, et al.Neurology. 2001 Mar 13;56(5):605-10. doi: 10.1212/wnl.56.5.605.Neurology. 2001.PMID: 11245710Clinical Trial.
Marras C, Lang A, Krahn M, Tomlinson G, Naglie G; Parkinson Study Group.Marras C, et al.Mov Disord. 2004 Jan;19(1):22-8. doi: 10.1002/mds.10642.Mov Disord. 2004.PMID: 14743356Clinical Trial.
Marras C, McDermott MP, Rochon PA, Tanner CM, Naglie G, Rudolph A, Lang AE; Parkinson Study Group.Marras C, et al.Neurology. 2005 Jan 11;64(1):87-93. doi: 10.1212/01.WNL.0000148603.44618.19.Neurology. 2005.PMID: 15642909