Cellular telephones Mobile phones 8 Telephone sets 8 Communication graphs 4 Demographic features 4 Mobile phone datum 4 Mobile-phone users 4 Mobility pattern 4 Population statistics 4 Wealth of information 4 Age groups 2 Argentina 2 Automatic Detection 2 Call detail records 2 Case-studies 2 Cellular telephone systems 2 Chagas disease 2 Demographics 2 Graph mining 2 Health risks 2 Homophily 2 Human mobility 2 Latin americans 2 Learning systems 2 Maps 2 Mobile phone social network 2 Mobile phone usages 2 Mobile telecommunication systems 2 Novel methodology 2 Observational study 2