Article with unspecified-but-present authorship ("consensus document")
The website you've linked to, under the "How to cite" tab, suggests the following format for the entry:


  (2008), Vacuum Assisted Closure: Recommendations for Use. International Wound Journal, 5: iii–19. doi: 10.1111/j.1742-481X.2008.00537.x


Note that there's no author information at all. I suppose that's not a problem for numeric-style citation call-outs, but it sort of begs the question what should be done if authoryear-style citation call-outs are to be used.

The printed article itself provides the string "Expert Working Group" (followed by the names of all members of the group) where one would usually provide the authors' names. This suggests using a "corporate author" approach, along the following scheme:

@article{vacrfu:2008,
  author  = {{Expert Working Group}},
  title   = {Vacuum Assisted Closure: {Recommendations} for Use},
  journal = {International Wound Journal},
  year    = 2008,
  volume  = 5,
  pages   = {iii--19},
  doi     = {10.1111/j.1742-481X.2008.00537.x},
}


Note the use of double curly braces around the argument of the author field.

If that's too unconventional for your taste, you might try either 

  author  = {{Expert Working Group (Apelqvist et al)}},


or, more simply, 

  author = {Jan Apelqvist and others},


as the content of the author field.