M. Fletcher

Randomized, controlled trial of dextromethorphan/quinidine for pseudobulbar affect in multiple sclerosis

R. Thisted, A. Achiron, T. Vollmer, 2006, Annals of neurology.

Treatment of rheumatoid arthritis with oral type II collagen. Results of a multicenter, double-blind, placebo-controlled trial.

J. Kremer, M. Weisman, D. Furst, 1998, Arthritis and rheumatism.