MexicoNew MexicoGulf of MexicoTexasPrevalenceRisk FactorsCentral AmericaCross-Sectional StudiesPetroleum PollutionQuestionnairesUnited StatesSocioeconomic FactorsIndians, North AmericanMexican AmericansTravelLatin AmericaArchaeologyRural PopulationEmigration and ImmigrationSouthwestern United StatesCitiesGeographyUrban PopulationInterviews as TopicHealthy People Programs