Search for poliovirus carriers among people with primary immune deficiency diseases in the United States, Mexico, Brazil, and the United Kingdom oleh Halsey Neal A., Pinto Jorge, Espinosa-Rosales Francisco, Faure-Fontenla María A., Silva Edson da, Khan Aamir J., Webster A.D.B., Minor Philip, Dunn Glynis, Asturias Edwin, Hussain Hamidah, Pallansch Mark A., Kew Olen M., Winkelstein Jerry, Sutter Roland