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While this approach was chosen as the most feasible method within the scope of our study, we recognize that it may not capture the full complexity of ETS exposure

Roots of your teeth are not covered with with same thickness of enamel and are made up of softer, more porous dentin material

[16] Hematinic deficiencies (vitamin B12, folic acid and iron), occurring singly or in combination, [8] and with or without any underlying gastrointestinal disease, may be twice as common in people with RAS

Investigators were able to fit participant schedules into the time constraints imposed by the academic schedule of the school system and that of the local health system