Sex (2) Health (2) Salud (2) Estudio (2) voyage (1) risque (1) association (1) matériau (1) histoire (1) SIDA (1) âge (1) Condom (1) Mexique (1) Travel (1) History (1) Methods (1) States (1) Teenagers (1) Social networks (1) Women (1) Weights and measures (1) Viruses (1) Sexually transmitted diseases (1) Travel (1) Subculture (1) Stocks (1) Social groups (1) Sampling (1) Risk (1) Municipal government (1)
Communication (3) Comunicación (3) Strategy (2) Methodology (2) Health promotion (2) Health (2) Cultura--Investigación (2) Salud (2) étable (1) établissement scolaire (1) méthodologie (1) abords (agglomération) (1) densité (1) Mexique (1) Density (1) Reliability (1) Children (1) Methodology (1) Scores (1) Labor (1) Mexico, North (1) Social networks (1) Year (1) Weights and measures (1) Viruses (1) Values (1) Trials (1) Technology (1) Tallies (1) Stability (1)