Naseem, A.A., Akram, M., Jahan, S., Afshan, K., Iqbal, Z., Tahir, F., Qayyum, M. and Rizvi, S.S.R., 2017. Age and Developmental Stage Dependent Changes in Plasma Concentrations of Growth Hormone and Testosterone and Linear Growth Velocity in Boys between the Age of 1 and 20 Years. Pakistan J. Zool., 49: 219-228.