Subjects: *RESEARCH; *STATISTICAL reliability; *RESEARCH methodology evaluationSPAIN
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Subjects: *Hydrocarbons; *Fluorocarbons; *Environmental exposureSpain
Subjects: Child Welfare* ; Hispanic or Latino* ; History*
Subjects: *RESEARCH; *COVID-19; *SOCIOECONOMIC factorsSPAIN
Subjects: EXERCISE tests; RESEARCH; AMATEUR athletesSPAIN
Subjects: PATIENT compliance; ANTIRETROVIRAL agents; RESEARCH fundingSPAIN
Subjects: ALCOHOLISM treatment; SUBSTANCE abuse treatment; COMPLICATIONS of alcoholismSPAIN
Subjects: QUALITY of work life; CORPORATE culture; SOCIAL workersSPAIN
Subjects: MEDICAL care research; POPULATION; STRUCTURAL modelsWALES; SPAIN
Subjects: HEALTH attitudes; ATTITUDES toward illness; CRONBACH'S alphaSPAIN