Acquired Immunodeficiency Syndrome; Adolescent; Crime; Evaluation Studies as Topic; HIV Infections; Health Services Needs and Demand; Ill-Housed Persons; Psychology; Risk-Taking; Sexual Behavior; Age Factors; Americas; Behavior; Brazil; Demography; Developing Countries; Disease; Economics; Geography; Latin America; Population; Population Characteristics; Research; Residence Characteristics; Social Problems; South America; Virus Diseases

Acquired Immunodeficiency Syndrome--prevention and control; Age Factors; Americas; Behavior; Brazil; Case Studies; Crime; Critique; Demographic Factors; Developing Countries; Diseases; Economic Factors; Geographic Factors; Hiv Infections--prevention and control; Homeless Persons; Latin America; Needs; Population; Population Characteristics; Psychosocial Factors; Research Methodology; Residence Characteristics; Risk Behavior; Sex Behavior; Social Problems; South America; Spatial Distribution; Studies; Viral Diseases; Youth