Natalizumab Treatment of Relapsing Remitting Multiple Sclerosis Has No Long-Term Effects on the Proportion of Circulating Regulatory T Cells oleh Radu Tanasescu, Nanci Frakich, I.-Jun Chou, Perla Filippini, Giulio Podda, Gao Xin, Ranjithmenon Muraleedharan, Oltita Jerca, David Onion, Cris S. Constantinescu