Exams 1 and 2
PII: S1542-3565(06)00225-4
doi:10.1016/j.cgh.2006.02.024
© 2006 American Gastroenterological Association Institute. Published by Elsevier Inc. All rights reserved.
PII: S1542-3565(06)00225-4
doi:10.1016/j.cgh.2006.02.024
© 2006 American Gastroenterological Association Institute. Published by Elsevier Inc. All rights reserved.