[1] Sanquin Research,Department of Experimental Immunology
[2] Landsteiner Laboratory,Department of Infectious Diseases
[3] Center for Infection and Immunity Amsterdam,undefined
[4] Academic Medical Center,undefined
[5] University of Amsterdam,undefined
[6] Tropical Medicine and AIDS,undefined
[7] Center for Infection and Immunity Amsterdam,undefined
[8] Academic Medical Center,undefined
[9] University of Amsterdam,undefined
[10] Present addresses: Department of Medical Microbiology,undefined
[11] Center for Infection and Immunity Amsterdam,undefined
[12] Academic Medical Center,undefined
[13] University of Amsterdam,undefined
[14] Amsterdam,undefined
[15] The Netherlands (M.R.A.W.) and Crucell Holland BV,undefined
[16] Leiden,undefined
[17] The Netherlands (H.S.).,undefined