Sana Sarfaraz, Mahira Iqbal, Ammarah Mehak, Tanveer Bano, Wajeeha Fatima, & Kiran Naseem. (2015). Polio still a Threat in Pakistan: Possible role of stability of polio vaccine. Asian Pacific Journal of Health Sciences, 2(4), 20–26. https://doi.org/10.21276/apjhs.2015.2.4.6