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García-Varela M, Pérez-Ponce de León G, de la Torre P, Cummings MP, Sarma SS, Laclette JP.García-Varela M, et al. Among authors: cummings mp.J Mol Evol. 2000 Jun;50(6):532-40. doi: 10.1007/s002390010056.J Mol Evol. 2000.PMID: 10835483