puits (1) temps (durée) (1) recherche (1) projet (1) modèle (1) perte (1) infection (1) revenu (1) santé (1) taux (1) Methods (1) Dependents (1) Rates (1) Minimum wage (1) Volunteers (1) Trials (1) Time (1) Sex (1) Research (1) Repentance (1) Population (1) Penance (1) Must (1) Men (1) Manufacturers' agents (1) Infection (1) Income (1) Impact (1) Health (1) Example (1)