We analyzed the presence of Th17 (T-bet−/RORC+), Th1 (T-bet+/RORC−), and Th17/1 (T-bet+/RORC+) cells by flow cytometry after 7 days of in vitro activation/expansion of Th cells from eRA patients and HD (Fig. 1). The gene discussed is RORC; the disease is Huntington disease.