In JPMA Vol 39 No.2, February 1989 following printing errors have been detected in the original article “Trace Element Studies on Karachi Populations, Part I: Normal Ranges for Blood, Copper, Zinc and Magnesium for Adults”.
a) Last line of the formula on Page 47 may kindly be corrected as follows:
The correlation coefficient
The plots are given in Figure 4 - 6 and the regression straight line equations and the correlation coefficients, r, are given in Table III.
b) Page No. 49 may be numbered 48 and page No. 48 as No. 49.