Reader Comments (46)

Post a new comment on this article

  • 0 Responses
    14 Sep 2012
    21:47 GMT
    Most Recent
    Publisher's Note: Errors in in-text citations. Posted by PLOS_ONE_Group on 14 Sep 2012 at 21:47 GMT
  • 0 Responses
    14 Jun 2012
    15:29 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:29 GMT
  • 0 Responses
    14 Jun 2012
    15:28 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:28 GMT
  • 0 Responses
    14 Jun 2012
    15:27 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:27 GMT
  • 0 Responses
    14 Jun 2012
    15:26 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:26 GMT
  • 0 Responses
    14 Jun 2012
    15:26 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:26 GMT
  • 0 Responses
    14 Jun 2012
    15:25 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:25 GMT
  • 0 Responses
    14 Jun 2012
    15:24 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:24 GMT
  • 0 Responses
    14 Jun 2012
    15:23 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:23 GMT
  • 0 Responses
    14 Jun 2012
    15:22 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:22 GMT
  • 0 Responses
    14 Jun 2012
    15:21 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:21 GMT
  • 0 Responses
    14 Jun 2012
    15:20 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:20 GMT
  • 0 Responses
    14 Jun 2012
    15:20 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:20 GMT
  • 0 Responses
    14 Jun 2012
    15:19 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:19 GMT
  • 0 Responses
    14 Jun 2012
    15:18 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:18 GMT
  • 0 Responses
    14 Jun 2012
    15:17 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:17 GMT
  • 0 Responses
    14 Jun 2012
    15:17 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:17 GMT
  • 0 Responses
    14 Jun 2012
    15:15 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:15 GMT
  • 0 Responses
    14 Jun 2012
    15:14 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:14 GMT
  • 0 Responses
    14 Jun 2012
    15:14 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:14 GMT
  • 0 Responses
    14 Jun 2012
    15:13 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:13 GMT
  • 0 Responses
    14 Jun 2012
    15:12 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:12 GMT
  • 0 Responses
    14 Jun 2012
    15:11 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:11 GMT
  • 0 Responses
    14 Jun 2012
    15:10 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:10 GMT
  • 0 Responses
    14 Jun 2012
    15:10 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:10 GMT
  • 0 Responses
    14 Jun 2012
    15:09 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:09 GMT
  • 0 Responses
    14 Jun 2012
    15:09 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:09 GMT
  • 0 Responses
    14 Jun 2012
    15:08 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:08 GMT
  • 0 Responses
    14 Jun 2012
    15:07 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:07 GMT
  • 0 Responses
    14 Jun 2012
    15:06 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:06 GMT
  • 0 Responses
    14 Jun 2012
    15:05 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:05 GMT
  • 0 Responses
    14 Jun 2012
    15:05 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:05 GMT
  • 0 Responses
    14 Jun 2012
    15:04 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:04 GMT
  • 0 Responses
    14 Jun 2012
    15:01 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:01 GMT
  • 0 Responses
    14 Jun 2012
    15:01 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:01 GMT
  • 0 Responses
    14 Jun 2012
    15:00 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 15:00 GMT
  • 0 Responses
    14 Jun 2012
    14:59 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 14:59 GMT
  • 0 Responses
    14 Jun 2012
    14:59 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 14:59 GMT
  • 0 Responses
    14 Jun 2012
    14:58 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 14:58 GMT
  • 0 Responses
    14 Jun 2012
    14:56 GMT
    Most Recent
    ref number correction Posted by kobayash on 14 Jun 2012 at 14:56 GMT
  • 0 Responses
    01 Mar 2012
    01:48 GMT
    Most Recent
    wrong ref 4 Posted by kobayash on 01 Mar 2012 at 01:48 GMT
  • 0 Responses
    01 Mar 2012
    01:47 GMT
    Most Recent
    wrong ref 3 Posted by kobayash on 01 Mar 2012 at 01:47 GMT
  • 0 Responses
    01 Mar 2012
    01:47 GMT
    Most Recent
    wrong numbers 2 Posted by kobayash on 01 Mar 2012 at 01:47 GMT
  • 0 Responses
    01 Mar 2012
    01:46 GMT
    Most Recent
    wrong numbers 1 Posted by kobayash on 01 Mar 2012 at 01:46 GMT
  • 0 Responses
    01 Mar 2012
    01:45 GMT
    Most Recent
    wrong ref 2 Posted by kobayash on 01 Mar 2012 at 01:45 GMT
  • 0 Responses
    01 Mar 2012
    01:44 GMT
    Most Recent
    wrong ref 1 Posted by kobayash on 01 Mar 2012 at 01:44 GMT