Table 1 Search strategy for MEDLINE

1

exp Neoplasms/ or (cancer*or tumor* or tumour* or neoplas*).mp.

2

((set or sets or dataset? or “data set?” or outcome?) adj3 (core or minimum or standard*)).mp.

3

(standard* adj3 (terminology or reporting or recommend* or criteria or guideline?)).mp.

4

((endpoint? or “end point?”) adj3 (develop* or define? or defini* or establish* or determin* or specif* or recommend*)).mp.

5

2 or 3 or 4

6

Consensus/ or Delphi Technique/

7

(consensus or agree* or Delphi or meeting or “expert? panel?” or (group adj6 recommendation?)).mp.

8

6 or 7

9

1 and 5 and 8