Footnotes

• Funding: The authors are employees of the Bolivian Street Children Project. The funding sources had no role in the preparation, review or approval of the manuscript or the decision to submit the manuscript for publication.

• Competing interests: None.

• ↵ⁱ “Each time a person stands up for an ideal or acts to improve the lot of others … he sends forth a tiny ripple of hope, and crossing each other from a million different centres of energy and daring, those ripples build a current that can sweep down the mightiest walls of oppression and resistance” Robert F. Kennedy