Guatemala, for example, has used mobile phones to train more than 300 aspiring nurses via distance education, helping to reduce a critical lack of skills. Telemedicine is increasingly making medical advice and treatment options available to people irrespective of their geographical location. Health platforms powered by mobile phones, for example, are used by frontline health workers to diagnose and treat pneumonia and preeclampsia, with the latter being the second-leading cause of maternal deaths. For example, Nigeria's SMDG Information System, launched in 2015, uses geo-referenced data from mobile phones to provide location-specific information about government services, environmental challenges, water access points etc.