The journal PLoS ONE has now published the article written by Lusophone researchers working under the auspices of the CISA Project "Epidemiological survey of Dande Municipal Council (Bengo/Angola) populations". This study results from the scientific work undertaken in the municipality of Dande and including a sample of over 3,000people.
http://dx.plos.org/10.1371/journal.pone.0033189