1 CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal; Department of Chemistry, University of Beira Interior, Covilhã, Portugal.
2 CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal; Department of Health Sciences, University of Beira Interior, Covilhã, Portugal; Laboratory of Clinical Pathology, Sousa Martins Hospital, ULS Guarda, Portugal.
3 CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal; Department of Chemistry, University of Beira Interior, Covilhã, Portugal. Electronic address: ctomaz@ubi.pt.