Ideal sources for Wikipedia's health content are defined in the guideline Wikipedia:Identifying reliable sources (medicine) and are typically review articles. Here are links to possibly useful sources of information about Carbohydrate deficient transferrin.
There's an alternate source for the article referenced at http://www.medlabstats.com/journal-club/alcohol-abuse.pdf which is not a pay-per-view source; however, I'm reluctant to change the link as it is not the official link for the article in its original journal. Any opinions on changing it? JulesH (talk) 14:37, 26 February 2013 (UTC)[reply]
I think it's better that you just add the alternative source. For example, add alternative free source after the original source. Eribro (talk) 12:44, 4 March 2013 (UTC)[reply]