1. Clinical Pathology Department; Hospital Nacional Guillermo Almenara Irigoyen, Lima, Peru.
2. School of Human Medicine, Faculty of Health Sciences, Universidad Peruana Union (UPeU), Lima, Peru.
3. Ministry of Health, Lima, Peru.
4. National Institute of Health, Lima, Peru.
5. Molecular Genetics and Biochemistry Laboratory, Universidad Científica del Sur, Lima, Peru.