PH Nibbering¹, E Broug-Holub², AC Bezemer¹, R Jansen¹, JGJ van de Winkel³, MF Geertsma¹.

1 Dept. of Infectious Diseases, University Hospital, Leiden, The Netherlands.
2 Dept. of Cell Biology and Immunology, Free University, Amsterdam, The Netherlands.
3 Dept. of Experimental Immunology, University Hospital, Utrecht, The Netherlands.

Received 12/7/95; Accepted 12/29/95; On-line 1/1/96

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