The rest of the story: More Marshall protocol hype from a Marshall affiliate
The Townsend Letter article may appear to side with Trevor Marshall, but let's take a look at the article and its author. It was not a scientific study, but rather merely an abstract discussion written to support a preconceived hypothesis. The author was J.C. Waterhouse, PhD (in Ecology with a minor in statistics). Like Trevor Marshall, she has no medical degree. Her only listed employment beyond postdoctoral research was as a statistics instructor at the University of Tennesse Knoxville.
Her very first listed publication just happened to be co-authored by Amy Proal, the noted Trevor Marshall shill writer and Proal's boyfriend and likewise Marshall shill and board member Paul Albert.
http://synergyhn.com/editor-2/
None of that should come as a surprise, given that the paper itself was originally written for and published by the Autoimmunity Research Foundation, which was founded in 2004 by guess who? Yep, Trevor Marshall.
http://www.ncbi.nlm.nih.gov/pubmed/19758226
And if you look at the actual page you linked to for the report in the Townsend Letter you will see, in addition to links in the article to Trevor Marshall, this information at the end of the article:
"The information needed to implement the Marshall Protocol is available free of charge from www.AutoimmunityResearch.org."
http://www.townsendletter.com/Jan2009/vitaminD0109.htm
Conclusion: Hardly an unbiased "scientific" paper.
BTW, you gotta love that "in silico analysis" part of the article. What the means is computer simulation. Garbage in, garbage out.