highly significantp < 0.01
Statistical significance was indicated by the following symbols: * for a significant difference ( p < 0.05), ** for a highly significant difference ( p < 0.01), and *** for an extremely significant difference ( p < 0.001).
Statistical significance was indicated by the following symbols: * for a significant difference ( p < 0.05), ** for a highly significant difference ( p < 0.01), and *** for an extremely significant difference ( p < 0.001).