Comment on

• Tea drinking habits and oesophageal cancer in a high risk area in northern Iran: population based case-control study.

  Islami F, Pourshams A, Nasrollahzadeh D, Kamangar F, Fahimi S, Shakeri R, Abedi-Ardekani B, Merat S, Vahedi H, Semnani S, Abnet CC, Brennan P, Møller H, Saidi F, Dawsey SM, Malekzadeh R, Boffetta P. Islami F, et al. BMJ. 2009 Mar 26;338:b929. doi: 10.1136/bmj.b929. BMJ. 2009. PMID: 19325180 Free PMC article.