Kuyvenhoven 1997.

Methods	Method: Postal survey sent to general practitioners (GPs) who expressed interest in participating in the RCT. Setting: Network of 450 GPs active in education or reseach in c. 1997. RCT: Treatment of patients presenting with sore throats.
Data	Recruitment data: Recruitment to RCT. (Dis)incentive data: Personal and practice of characteristics of clinicians.
Comparisons	Comparison of personal and practice characteristics of clincians with recruitment.
Outcomes	Recruitment to the RCT.
Notes	No details of the development of the questionnaire. Descriptive data only reported for most factors. Response rate 93/107 (90%). 71 GPs agreed to participate in the trial of whom 17 (24%) did not recruit.