Affiliation: | 1. Palliative Care Unit, Hospital de Cancer de Barretos, Unidade II, Rua 20, 221, Centro, Barretos, S?o Paulo, 14780-070, Brazil 2. Department of Public Health, Botucatu Medical School, S?o Paulo State University (UNESP), Botucatu, S?o Paulo, Brazil 3. Oncological and Hemato-oncological Center, Botucatu Medical School, S?o Paulo State University (UNESP), Botucatu, S?o Paulo, Brazil 4. Laboratory of Nanobiotechnology, Federal University of Uberlandia (UFU), Uberlandia, Minas Gerais, Brazil 5. Department of Nursing, Botucatu Medical School, S?o Paulo State University, UNESP, Botucatu, S?o Paulo State, Brazil 6. Department of Internal Medicine, Botucatu Medical School, S?o Paulo State University (UNESP), Botucatu, S?o Paulo, Brazil
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