Methylene blue to treat protamine-induced anaphylaxis reactions. An experimental study in pigs - Albuquerque, Agnes Afrodite S.; Margarido, Edson A.; Menardi, Antonio Carlos; Scorzoni Filho, Adilson; Celotto, Andrea Carla; Rodrigues, Alfredo José; Vicente, Walter Villela de Andrade; Évora, Paulo Roberto Barbosa (Brazilian Journal of Cardiovascular Surgery, 2016)