Review article: diagnosis, management and patient perspectives of the spectrum of constipation disorders.

"Declaration of personal interests : Dr. A. Sharma served on advisory boards for Ironwood Pharmaceuticals, Phathom Pharmaceuticals and Salix Pharmaceuticals. Dr. S. S. C. Rao has served on the advisory board for Medtronic, Takeda Pharmaceuticals and Salix Pharmaceuticals. K. Kearns has served as a speaker for Medtronic and Takeda Pharmaceuticals, and a speaker and advisory board member for Salix Pharmaceuticals. K. D. Orleck has served as a speaker for AbbVie Pharmaceuticals, Allergan Pharmaceuticals and Salix Pharmaceuticals. Dr. S. A. Waldman has served on advisory boards for Salix Pharmaceuticals. He serves on the Board of Directors and is Chair of the Scientific Advisory Board for Targeted Diagnostics & Therapeutics, Inc."

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