A. Iftikhar, T. Asim, A. U. Islam, and S. T. Ahmed, “ASSOCIATION OF SERUM P1NP (N-TERMINAL PROPEPTIDE OF TYPE1 COLLAGEN) AND BONE MINERAL DENSITY (BMD) IN OSTEOPOROSIS: BMD And P1NP”, PAFMJ, vol. 68, no. 2, pp. 357–62, Apr. 2018.