Rocha, G.P. et al. 2018. Anemia as the cause of clinical inability of candidates to blood donation for a hemotherapy and hematology center in the state of Maranhão, Brazil. Medicina (Ribeirao Preto). 51, 3 (Nov. 2018), 189–196. DOI:https://doi.org/10.11606/issn.2176-7262.v51i3p189-196.