Reviewer's□report 
□Helicobacter□pylori□(H□pylori)□infection□in□South-East□Europe:□the□changing□prevalence□during□a□ Title: 
ten-year□period□and□its□antigenic□profile. 
Authors: 
Periklis□Apostolopoulos□( periklisapo@yahoo.com )
Irene□Vafiadis□( i.vafiadis@grmedia.gr )
Michael□Tzivras□( pola@med.uoa.gr )
Dimitrios□Kourtessas□( akorba@med.uoa.gr )
Nicolaos□Katsilambros□( laennec@techlink.gr )
Athanasios□Archimandritis□( aarchim@hotmail.com )
□3□ □29□Apr□2002 Version: Date: 
□Dr□Angel□Lanas Reviewer: 
□A□paper□whose□findings□are□important□to□those□with□closely□related□research□interests Level□of□interest: 
□Accept□after□discretionary□revisions Advice□on□publication: 
I□have□noporblems□with□the□manuscript.□I□still□think□they□need□to□include□1-2□sentences□in□the□Statistics□ 
saying□how□they□estimated□the□sample□size. 
Competing□interests: 
None□declared. 
Reviewer's□report 
□Helicobacter□pylori□(H□pylori)□infection□in□South-East□Europe:□the□changing□prevalence□during□a□ Title: 
ten-year□period□and□its□antigenic□profile. 
Authors: 
Periklis□Apostolopoulos□( periklisapo@yahoo.com )
Irene□Vafiadis□( i.vafiadis@grmedia.gr )
Michael□Tzivras□( pola@med.uoa.gr )
Dimitrios□Kourtessas□( akorba@med.uoa.gr )
Nicolaos□Katsilambros□( laennec@techlink.gr )
Athanasios□Archimandritis□( aarchim@hotmail.com )
□3□ □29□Apr□2002 Version: Date: 
□Dr□Angel□Lanas Reviewer: 
□A□paper□whose□findings□are□important□to□those□with□closely□related□research□interests Level□of□interest: 
□Accept□after□discretionary□revisions Advice□on□publication: 
I□have□noporblems□with□the□manuscript.□I□still□think□they□need□to□include□1-2□sentences□in□the□Statistics□ 
saying□how□they□estimated□the□sample□size. 
Competing□interests: 
None□declared. 
Please review this paper.
user
Reviewer's□report 
□Helicobacter□pylori□(H□pylori)□infection□in□South-East□Europe:□the□changing□prevalence□during□a□ Title: 
ten-year□period□and□its□antigenic□profile. 
Authors: 
Periklis□Apostolopoulos□( periklisapo@yahoo.com )
Irene□Vafiadis□( i.vafiadis@grmedia.gr )
Michael□Tzivras□( pola@med.uoa.gr )
Dimitrios□Kourtessas□( akorba@med.uoa.gr )
Nicolaos□Katsilambros□( laennec@techlink.gr )
Athanasios□Archimandritis□( aarchim@hotmail.com )
□3□ □29□Apr□2002 Version: Date: 
□Dr□Angel□Lanas Reviewer: 
□A□paper□whose□findings□are□important□to□those□with□closely□related□research□interests Level□of□interest: 
□Accept□after□discretionary□revisions Advice□on□publication: 
I□have□noporblems□with□the□manuscript.□I□still□think□they□need□to□include□1-2□sentences□in□the□Statistics□ 
saying□how□they□estimated□the□sample□size. 
Competing□interests: 
None□declared. 
assistant