What arguments are given that Ephesians was not written by Paul?

According to the opening paragraph of the article for the Book of Ephesians on Wikipedia, it is not universally held that Ephesians was written by Paul. A source on that site says, > Hoehner surveys 279 commentators from 1519 to 2001, finding 54% favor Pauline authorship, 39% conclude against Pauline authorship, and 7% remained uncertain. What arguments support the claim that Paul did not write the book of Ephesians?