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Education on sanitation practices that provides information on the domestication phenomenon of Triatominae , the role of some construction materials as habitats for vectors , and the role of domestic animals is essential when starting campaigns for vectorial control.Patients in the latent or indeterminate phase of infection must be informed that they should not give blood for transfusions . The role of tropical SSTs is revealed from another GCM ensemble in which monthly SST variations are prescribed over only the 30N-30S band . The role of non-balloon devices continues to evolve as experience grows and technology improves ( Table 5 ) . The role of traditional institutions is well appreciated in the project documents . However , currently no evidence suggests that levodopa accelerates disease progression in patients with PD.The role of genetic factors has been studied in twins.If genetic factors are important , concordance in genetically identical monozygotic ( MZ ) twins will be greater than in dizygotic ( DZ ) twins , who share only about 50 % of genes .