1 Operational Research Unit, Doctors with Africa CUAMM, 1363 Beira, Mozambique; Department of Infectious Diseases, University of Bari, Bari, Italy.
2 Operational Research Unit, Doctors with Africa CUAMM, 1363 Beira, Mozambique; Department of Science for Health Promotion and Mother to Child Care, University of Palermo, Palermo, Italy.
3 Department of Surgery, Central Hospital of Beira, Beira, Mozambique.
4 Operational Research Unit, Doctors with Africa CUAMM, 1363 Beira, Mozambique. Electronic address: d.pizzol@cuamm.org.