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Figure 1.

Diagram of a hookah.

Source: Wikipedia (http://en.wikipedia.org/wiki/File:Hookah-lookthrough.svg), after modification.

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Table 1.

GERD symptoms in 50,001 individuals with data on GERD in the Golestan Cohort Study.

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Table 1 Expand

Table 2.

Association of several demographic and lifestyle factors with daily and severe GERD symptoms.

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Table 2 Expand

Table 3.

Association of hookah and nass use with GERD symptoms in never cigarette smokers.

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Table 3 Expand

Table 4.

Association between anthropometric indices and daily and severe GERD symptoms by sex.

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