The concentration in response to naming is 1.3 mcg / ml (1.0 - 1.8mcg / ml) equivalent to OAA / S = 3, responding to loud calls and repeating names is 1.7mcg / ml (1, 22 - 2, 2 mcg / ml), response to pinch lift is 2.4 mcg / ml (1.8 - 3.0mcg / ml) and loss of response when scaling is 2.8 mcg / ml (2.0-3.6 mcg/ml).