T. Khosrorad, mahrokh Dolatian, H. Riazi, Z. Mahmoodi, S. Shahsavari, and M. Yadegari, “Comparison of Physical Activity in Fertile and Infertile Couples in Kermanshah, Iran during 2013”, Adv Nurs Midwifery, vol. 25, no. 89, pp. 1–9, Feb. 2016.