ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
ERTal = integral from t_0 to t_1 of (beta * ΔPain) / (1 + e^(-k(t))) dt
