I am going to suggest an idea that you may not have thought of. The US NIH (National Institutes of Health) maintains a database of medical abstracts, PubMed. This LINK is the same article.

There are a huge number of tools to access this database. pubcrawler is an example.

What I am suggesting is that using an even bigger database of which the Karger articles would be a subset may be the way to go.

I've written 3 posts about PubMed: Marshall re: Pub Med. (Hit the search button when this screen appears). The node titles that I replied to are not informative to say the least! But I would suggest that you read these posts because I think that you will find some interesting pointers. Basically there are Perl tools and source code that will do what you want in an even more efficient and better way than scanning/parsing html pages.

I don't want to act as free advertisement for commercial products here, but there are professional level complete applications that do what you want and even more, but they will cost about $700.

Update:
Even this node title: "Re: web search for certain data" would not lead one to believe that what the real problem is to search medical databases. Again, the big, super big medical databases provide applications and Perl code to access them efficiently. One of my articles talks about how to be a "polite consumer".

In reply to Re: web search for certain data by Marshall
in thread web search for certain data by pydi

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.