Population (4) Population (3) Manufacturers' agents (3) Example (3) Commission merchants (3) temps (durée) (2) échantillonnage (2) bassin de retenue (2) art (2) modèle (2) abords (agglomération) (2) Decay (2) Art (2) Art (2) World health (2) Time (2) Swiss (2) Sampling (2) Public health (2) Patients (2) Human beings (2) Determinants (2) Art (2) Use (2) Influence (2) Transmission (2) Size (2) Sampling (2) Patients (2) Models (2)