Unfortunately, neither your Cooper or Rowan credentials will work. You will need to register for a ClinicalKey account to download certain chapters.
To create a personal Clinical Key account, go to CMSRU's ClinicalKey database. Once in the database, find and click Log in in the upper right corner. A small log in box will appear. Click the Not Registered link.
A registration form will appear for you complete. When you're done click register at the bottom. A My Clinical Key link will now appear in the upper right corner of the screen with your name and a log out link.
After registering, you will be able to download the chapter.