Health-Related Quality of Life, Work Productivity, and Daily Activity Among A Sample of Commercially Insured Patients With Irritable Bowel Syndrome With Constipation or Chronic Constipation In The United States. - Cai, Q; Buono, JL; Spalding, WM; Stephenson, JJ; Tan, H; Carson, RT; Doshi, JA; Buono, J L; Spalding, W M; Stephenson, J J; Carson, R T; Doshi, J A (Value in Health, 2015)