Volume 72, no. 4, p. 3252, Fig. 2B: The y axis numbers “0, 20, 40, and 60” should read “0, 2.0 × 104, 4.0 × 104, and 6.0 × 104;” in Fig. 2C, the y axis numbers “0.1, 1, 10, 102, 103, 104, 105, 106, and 107” should read “0, 0.1, 1, 10, 102, 103, 104, 105, and 106.”
Page 3254, Table 3: In the reference column, “23, 23, 23, 15, 25, 12, 12, 12, 12” should read as “24, 24, 24, 19, 26, 16, 16, 16, 16.” In footnote c, last sentence, “23” should read as “24.”