{Reference Type}: Journal Article {Title}: Opioid-Induced Constipation (OIC) Guideline. {Author}: Crockett S;Greer KB;Sultan S; {Journal}: Gastroenterology {Volume}: 156 {Issue}: 1 {Year}: 01 2019 {Factor}: 33.883 {DOI}: 10.1053/j.gastro.2018.10.044 {Abstract}: