Improve Design and Readability of Existing Web Page

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This customer received 11 web designs from 3 designers. They chose this web design from pb as the winning design.
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Web Design Brief
Radiopaedia.org is a free educational radiology resource with one of the web's largest collections of radiology cases and reference articles. This job involves improving the design of the article pages to make the text more readable.
We want a new design for the body of the article page that has considered at least: the typeface, vertical rhythm, line length, line height and styling of the text, headings and other standard HTML elements. IMPORTANT: You would only be designing the content area of the page, inside the existing layout, as indicated here: http://d.pr/i/Gn7E
If you are the successful applicant you'll have your work featured across the 6000+ article pages on the site.
The HTML elements that you will need to consider in your design are:
* Headings (three levels)
* Paragraphs
* Superscript and Subscript text
* Ordered and unordered lists, potentially nested multiple levels deep
* Links to other radiopaedia content (blue links)
* Links to other radiopaedia content that does not yet exist (grey links)
The articles are accessible at: http://radiopaedia.org/encyclopaedia/all/all
Sample articles that can be used for reference and as a base for the redesign:
* http://radiopaedia.org/articles/neurosarcoidosis
* http://radiopaedia.org/articles/golden_s_sign
* http://radiopaedia.org/articles/fetal-heart-rate
* http://radiopaedia.org/articles/meningioma
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.