1. Department of Global Public Health, Karolinska Institutet, Tomtebodavägen 18B, 17165 Solna, Sweden.
2. FOCUS 1000, Freetown, Sierra Leone.
3. Centers for Disease Control and Prevention, Atlanta, United States of America (USA).
4. United Nations Children’s Fund, Freetown, Sierra Leone.
5. Catholic Relief Services, Freetown, Sierra Leone.
6. Sierra Leone Ministry of Health and Sanitation, Freetown, Sierra Leone.