In logistic regression analyses , there was an intervention effect for willingness to donate : urine if had cancer -LSB- OR , @ ; @ % confidence interval ( CI ) , @-@ @ -RSB- , toenails if healthy ( OR , @ ; @ % CI , @-@ @ ) or had cancer ( OR , @ ; @ % CI , @-@ @ ) , hair if healthy ( OR , @ ; @ % CI , @-@ @ ) or had cancer ( OR , @ ; @ % CI , @-@ @ ) , and unused cancerous tissue ( OR , @ ; @ % CI , @-@ @ ) .