Geographic Distribution of vacA Allelic Types of Helicobacter pylori

LEEN–JAN VAN DOORN,* CE´U FIGUEIREDO,*,‡ FRANCIS ME´GRAUD,§ SALVADOR PENA,\ PETER MIDOLO,¶ DULCIENE MARIA DE MAGALHA˜ES QUEIROZ,# FA´TIMA CARNEIRO,‡ BART VANDERBORGHT,**,‡‡ MARIA DA GLO´ RIA F. PEGADO,** RICARDO SANNA,* WINK DE BOER,§§ PETER M. SCHNEEBERGER,§§ PELAYO CORREA,\\ ENDERS K. W. NG,¶¶ JOHN ATHERTON,## MARTIN J. BLASER,*** and WIM G. V. QUINT*
GASTROENTEROLOGY 1999;116:823–830