AUTHOR'S CORRECTION
Volume 77, no. 18, p. 6703–6705, 2011. The hemoglobin yield data are being corrected because the dilution factor used in the formula to compute hemoglobin production was incorrect. This led to an error in the amount of hemoglobin that was reported.
Page 6703, abstract, line 3: “11.92” should read “6.56.”
Page 6704: Figure 3A should appear as shown below.
Page 6704, Fig. 3A legend, line 6: “0.5” should read “0.25.”
Page 6704, column 2, line 9: “0.48 ± 0.32” should read “0.281 ± 0.169.”
Page 6704, column 2, line 11: “7.1 ± 2.26” should read “3.95 ± 1.24.”
Page 6704, column 2, line 12: “11.92 ± 0.62” should read “6.56 ± 0.28.”
Page 6704, column 2, line 15: “31-fold” should read “17-fold.”
Page 6704, column 2, line 18: “0.6 ± 0.54” should read “0.334 ± 0.301.”