| Factor | Contributor |
|---|---|
| Study design/conception | DW, LJH, KPS |
| Acquisition of data | LJH |
| Analysis and interpretation of data | DW, LJH, SN, KPS |
| Drafting of manuscript | DW |
| Critical revision for intellectual content | DW, LJH, KPS |
| Final approval | DW, LJH, KPS |
| Provision of study materials or patients | AA, JTA, WRD, CCK, RM, ECM, RDP, KPS, MLW, BRW, RWW |
| Statistical expertise | SN |
| Obtaining of funding | KPS |
| Administrative, technical or logistic support | ? |
| Collection and assembly of data | AA, JTA, WRD, LJH, CCK, RM, ECM, RDP, KPS, MLW, BRW, RWW |
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