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Serpa, A. B. M.; Guinsburg, R.; Balda, R. de C. X.; Santos, A. M. N. dos; Areco, K. C. N.; Peres, C. A. Multidimensional Pain Assessment of Preterm Newborns at the 1st, 3rd and 7th Days of Life. Sao Paulo Med J 2007, 125, 29-33.