1. Research Laboratory, Immunoassay Center, Havana, Cuba
2. Prenatal Screening and Tumor Markers Laboratory, Immunoassay Center, Havana, Cuba
3. Department of Protein Purification, Immunoassay Center, Havana, Cuba
4. Vice Direction of Research, Immunoassay Center, Havana, Cuba
5. Vice Direction of Immunochemistry, Immunoassay Center, Havana, Cuba