Coalition for Health and Gender Equity (CHANGE)—a protocol for a global cross-sectional survey of health and gender equity in rheumatology od Khursheed, T, Ovseiko, P, Dyball, S, Nakashima, R, Gonzalez, AMA, Babini, A, Kalla, AA, Hill, C, Danda, D, Dey, D, Traboco, L, Nikiphorou, E, Harifi, G, Badshah, H, Hmamouchi, I, Marie Von Feldt, J, Farani, JB, Andreoli, L, Guimarães, MP, Toro Gutiérrez, CE, Sieiro Santos, C, Duftner, C, Alpizar Rodriguez, D, Ziadé, N, Coates, L