puits (1) enquête (1) surveillance (1) stress (1) état (1) recherche (1) stress psychologique (1) modèle (1) investigation (1) méthode (1) ordre (1) Mexique (1) Instruments (1) Symptoms (1) Stress (Psychology) (1) Research (1) Persons (1) Order (1) Mexicans (1) Mental health (1) Manufacturers' agents (1) Human beings (1) Factor analysis (1) Example (1) Commission merchants (1) Anxiety (1) Older people (1) Adulthood (1) Confirmatory factor analysis (1) Research (1)