PT  - JOURNAL ARTICLE
AU  - Paula-J Roberts
AU  - Chris Roberts
AU  - Bonnie Sibbald
AU  - David J Torgerson
TI  - The effect of a direct payment or a lottery on questionnaire response rates: a randomised controlled trial
AID  - 10.1136/jech.54.1.71
DP  - 2000 Jan 01
TA  - Journal of Epidemiology and Community Health
PG  - 71--72
VI  - 54
IP  - 1
4099  - http://jech.bmj.com/content/54/1/71.short
4100  - http://jech.bmj.com/content/54/1/71.full
SO  - J Epidemiol Community Health2000 Jan 01; 54