I just saw that my old published journal article on this subject is no longer accessible online (it appeared in a peer-reviewed e-journal back in the day). Here is the citation, along with the PDF.
Heiser, Michael. “Did Jesus Allow for Reincarnation? Assessing the syntax of John 9: 3-4.” Scandinavian Evangelical E-Journal 1 (2010): 1-14.
A *very* abbreviated (and non-academic) treatment of this passage also appeared in my short book of collected articles from Bible Study Magazine: I Dare You Not to Bore Me with The Bible.