Hollis J F, Bills R, Whitlock E, Stevens V J, Mullooly J, Lichtenstein E
Center for Health Research, Kaiser Permanente, 3800 N Interstate Avenue, Portland, OR 97227-1110, USA.
Tob Control. 2000;9 Suppl 1(Suppl 1):I18-24. doi: 10.1136/tc.9.suppl_1.i18.