[1] Leiden Univ, Med Ctr, Dept Infect Dis, NL-2300 RC Leiden, Netherlands
[2] Leiden Univ, Med Ctr, Immunohematol & Bloodbank, NL-2300 RC Leiden, Netherlands
[3] Erasmus MC, Dept Dermatol & Venerol, Rotterdam, Netherlands
[4] AstraZeneca R&D Charnwood, Dept Mol Biol, Loughborough, Leics, England