Evaluation of the bag-mediated filtration system as a novel tool for poliovirus environmental surveillance: Results from a comparative field study in Pakistan. oleh Nicolette Angela Zhou, Christine Susan Fagnant-Sperati, Jeffry Hiroshi Shirai, Salmaan Sharif, Sohail Zahoor Zaidi, Lubna Rehman, Jaffer Hussain, Rahim Agha, Shahzad Shaukat, Masroor Alam, Adnan Khurshid, Ghulam Mujtaba, Muhammed Salman, Rana Muhammed Safdar, Abdirahman Mahamud, Jamal Ahmed, Sadaf Khan, Alexandra Lynn Kossik, Nicola Koren Beck, Graciela Matrajt, Humayun Asghar, Ananda Sankar Bandyopadhyay, David Scott Boyle, John Scott Meschke