Lung and Bronchus Cancer in Puerto Rico: Changes in Incidence and Mortality Rates by Histology and Sex During 1987-2003: comment on the article by Rivas et al; Reply; Pediatric Brain Tumors in Puerto Rico: comment on the article by Saavedra et al; Reply - Quintero-Aguiló, Mario E.; Laureano, Angel F.; Rivas, Hiram; Saavedra, Fanor M.; Fernández-Vázquez, Milagros; Vigo-Prieto, Juan (Puerto Rico Health Sciences Journal, 2012)