Affiliation: | 1. Center for Genetic Engineering and Biotechnology, Ave 31 between 158 and 190, P.O. Box 6162, 10600, Havana, Cuba 2. Tobacco Research Institute, Tumbadero Road, km 8?. San Antonio de los Ba?os, Havana, Cuba 3. Center for Engineering and Chemical Researches, F Street, # 115 be/ Ave 5th and Calzada, 10400, Havana, Cuba
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