[Effectiveness in the medium and long term of school campaigns in favour of organ donation].
D000293:Adolescent; D001290:Attitude; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D012574:Schools; D013030:Spain; D011795:Surveys and Questionnaires; D013997:Time Factors; D014019:Tissue Donors; D009927:Tissue and Organ Procurement / Q000379:methods