Pin to Board Add to Existing Board You are not currently logged in. Log in or create an account to save and view pinboards. Create New Board Association Between Long-term Oral Contraceptive Use and Risk of Crohn’s Disease Complications in a Nationwide Study – ScienceDirect Source: Association Between Long-term Oral Contraceptive Use and Risk of Crohn’s Disease Complications in a Nationwide Study – ScienceDirect