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Table 6 Sources of conference abstracts and unpublished study information on 28 RCTs: manufacturers, authors, congress proceedings, and authorities

From: Negative pressure wound therapy: Potential publication bias caused by lack of access to unpublished study results data

No Abstracts or other sources Manufacturers Authors* Congress proceedings* Authorities*
   Kinetic Concepts, Inc. Blue Sky Medical   WUWHS 2004 [45] Others Experts 2003 Others
1 Vuerstaek [74] + - - + - - -
2 No abstract - - - - - - -
3 Obdeijn [75] + - - + - + -
4 Payne [76] + - + + - - -
5 Moues [77] + - - + - + -
6 Heath [78] + - + - - - -
7 No abstract§ + - - - - - -
8 No abstract|| + - - - - - -
9 Joseph [79] + - - - - + -
10 Adams [26] - - - - - - -
11 Fryer [27] - - - - - - -
12 McCarthy [28] - - + - - - -
13 Walker [29] - - - - - - -
14 No abstract + - - - - - -
15 No abstract# + - - - - - -
16 Bayer [31] + - - + - - -
17 Greer [33] + - - - - + -
18 Orgill [34] + - - + - - -
19 Stannard [35] + - - + - - -
20 Armstrong [36] + - + + - - -
21 McCarthy [37] - - - - - - -
22 Molnar [38] + - - + - - -
23 Niezgoda [39] + - - + + - -
24 Stannard [40] + - - + - - -
25 Stannard [41] + - - + - - -
26 Foo [42] - - - + - - -
27 Gupta [43] - - - - + - -
28 Lantis [44] - - - + - + -
   19 0 4 14 2 5 0
  1. * See Table 1.
  2. † Citations submitted by experts to the German Federal Joint Committee.
  3. ‡ No preceding abstract was identified concerning the full-text article by Llanos 2006 (Tables 7–9).
  4. §No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Eginton 2003 (Tables 7–9).
  5. || No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Wanner 2003 (Tables 7–9).
  6. ¶No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Ford 2002 (Tables 7–9).
  7. # No preceding abstract was identified, but information by the manufacturer KCI was provided concerning this discontinued study KCI ID VAC 2001–02.
  8. RCT: randomised controlled trial; WUWHS: World Union of Wound Healing Societies