title: Trial and error.
mesh_terms: D002986:Clinical Trials as Topic / Q000191:economics / Q000941:ethics* / Q000592:standards; D057176:Compassionate Use Trials / Q000191:economics / Q000941:ethics / Q000592:standards; D035082:Federal Government; D006801:Humans; D007558:Italy; D010361:Patients / Q000523:psychology; D015203:Reproducibility of Results; D033581:Stem Cell Transplantation / Q000941:ethics* / Q000592:standards; D035501:Uncertainty