Use of the NeuroMate stereotactic robot in a frameless mode for movement disorder surgery. - Varma,T.RK.; Eldridge,P.R.; Forster,A.; Fox,S.; Fletcher,N.; Steiger,M.; Littlechild,P.; Byrne,P.; Sinnott,A.; Tyler,K.; Flintham,S. (Stereotact Funct Neurosurg, 2003)