Helicobacter pylori antibiotic resistance in Brazil: clarithromycin is still a good option - Eisig, Jaime Natan; Silva, Fernando Marcuz; Barbuti, Ricardo Correa; Rodriguez, Tomás Navarro; Miraes Filho, Joaquim Prado Pinto; Pedrazzolo Junior, José (Arquivos de gastroenterologia, 2011)