1.nature publishing groupPRACTICE GUIDELINES308 The American Journal of GASTROENTEROLOGY VOLUME 108 | MARCH 2013 www.amjgastro.com see related editorial on page x Gastroesophageal…
nature publishing group PRACTICE GUIDELINES 308 The American Journal of GASTROENTEROLOGY VOLUME 108 | MARCH 2013 www.amjgastro.com see related editorial on page x Gastroesophageal…