Cannabinoids for treatment of spasticity and other symptoms related to multiple sclerosis (CAMS study): multicentre randomised placebo-controlled trialJohn Zajicek, Alan J. Thompson, Jane Vickery et al.|The Lancet|2003Cited by 828
Rating scales as outcome measures for clinical trials in neurology: problems, solutions, and recommendationsJeremy Hobart, Alan J. Thompson, Stefan Cano et al.|The Lancet Neurology|2007Cited by 497