This guideline was developed using a process outlined elsewhere.1 Briefly, the American Gastroenterological Association Institute (AGA) process for developing clinical practice guidelines incorporates Grading of Recommendations Assessment, Development, and Evaluation (GRADE) methodology2 and best practices as outlined by the Institute of Medicine.3 GRADE methodology was used to prepare the background information for the guideline and the technical review that accompanies it.4 Optimal understanding of this guideline will be enhanced by reading applicable portions of the technical review.