Chiriboga David, Buss Paulo, Birn Anne-Emanuelle, Garay Juan, Muntaner Carles, Nervi Laura
Hospital de Zumbahua, Zumbahua, Cotopaxi, Ecuador.
Oswaldo Cruz Foundation's Center for Global Health, Rio de Janeiro, Brazil.
Lancet. 2014 Mar 15;383(9921):949. doi: 10.1016/S0140-6736(14)60473-6.