Table 1. Presentation of lung metastasis on day 14 after tumour cell injection.

	Dead mice	Live mice	Total (dead+live)
PBS	6/6	8/14	14/20	70%
Morphine	12/12	6/6	18/18	100%
Celecoxib	0/2	3/10	3/12	25%
Celecoxib+morphine	2/2	4/16	6/18	33%

Metastasis was examined in the H&E stained lung sections of mice that died on day 14 and in the lungs of mice remaining alive. Data are expressed as number of mice with lung metastasis/number of mice in the specific treatment group on day 14 (alive and/or dead).