Case-control vaccine effectiveness studies: data collection, analysis and reporting results by Verani, J, Baqui, A, Broome, C, Cherian, T, Cohen, C, Farrar, J, Feikin, D, Groome, M, Hajjeh, R, Johnson, H, Madhi, S, Mulholland, K, O'Brien, K, Parashar, U, Patel, M, Rodrigues, L, Santosham, M, Scott, J, Smith, P, Sommerfelt, H, Tate, J, Victor, J, Whitney, C, Zaidi, A, Zell, E

Case-control vaccine effectiveness studies: Preparation, design, and enrollment of cases and controls. by Verani, J, Baqui, A, Broome, C, Cherian, T, Cohen, C, Farrar, J, Feikin, D, Groome, M, Hajjeh, R, Johnson, H, Madhi, S, Mulholland, K, O'Brien, K, Parashar, U, Patel, M, Rodrigues, L, Santosham, M, Scott, J, Smith, P, Sommerfelt, H, Tate, J, Victor, J, Whitney, C, Zaidi, A, Zell, E