Reader Comments (2)

Post a new comment on this article

  • 0 Responses
    28 Jan 2008
    21:20 GMT
    Most Recent
    ESTIMA link Posted by PLOS_ONE_Group on 28 Jan 2008 at 21:20 GMT
  • 0 Responses
    11 Jan 2008
    16:30 GMT
    Most Recent
    Referee comments: Referee 1 Posted by PLOS_ONE_Group on 11 Jan 2008 at 16:30 GMT