Birthplace (1) Assaying (1) Charts, diagrams, etc (1) School-to-work transition (1) Event history analysis (1) Time (1) Spleen (1) Sexual intercourse (1) Proportion (1) Concord (1) Africans (1) Use studies (1) Use studies (1) Mathematical models (1) Recruiting (1) Age (1) Analysis (1) Birth (1) Evolution (1) Rates (1) Population (1) Marriage (1) Migration (1) Nacimiento (1) Africanos (1) Bazo (1) Parto (1) Evolucionismo (1) Tiempo (1) Relaciones sexuales (1)