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Correspondence response
Response to: ‘The country of residence affects the phenotype of familial Mediterranean fever? Is it real or a selection bias?’ by Korkmaz
  1. Erkan Demirkaya1,
  2. Seza Ozen2
  1. 1Division of Pediatric Rheumatology, Gulhane Military Medical Academy, Ankara, Turkey
  2. 2Division of Pediatric Rheumatology, Hacettepe University, Ankara, Turkey
  1. Correspondence to Professor Seza Ozen, Department of Pediatric Rheumatology, Hacettepe University, Sihhiye, Ankara 6100, Turkey; sezaozen{at}

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In our recent study, we provide evidence on the effect of migration on disease phenotype for the patients with familial Mediterranean fever (FMF) by comparing large numbers of eastern Mediterranean patients who have migrated to different European countries. We confirmed that patients with an eastern Mediterranean ancestry display milder phenotypic manifestations in a western environment.1 We would like to answer some questions raised by the letter of Korkmaz C.2

The percentage of Turkish patients was indeed higher in group A, whereas the percentage of Jewish patients increased among group …

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  • Competing interests None.

  • Provenance and peer review Commissioned; internally peer reviewed.

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